How do colon polyps differ from diverticulitis. What are the risk factors for developing these conditions. Can dietary changes help prevent colon polyps and diverticulitis. Are there any shared symptoms between these two conditions. How are colon polyps and diverticulitis diagnosed and treated.

The Anatomy and Function of the Colon

The colon, also known as the large intestine, plays a crucial role in our digestive system. It is responsible for absorbing water and electrolytes from digested food, forming and storing feces until elimination. Understanding the colon’s structure and function is essential for comprehending the development of conditions like colon polyps and diverticulitis.

The colon is divided into several sections:

• Cecum
• Ascending colon
• Transverse colon
• Descending colon
• Sigmoid colon
• Rectum

Each section has a specific role in the digestive process. The colon’s inner lining, called the mucosa, is where most of the absorption occurs and where polyps can develop. The muscular layers of the colon wall are involved in the formation of diverticula, which are small pouches that can become inflamed in diverticulitis.

Defining Colon Polyps: Types and Characteristics

Colon polyps are abnormal growths that protrude from the inner lining of the colon. They can vary in size, shape, and number. While most polyps are benign, some can develop into colorectal cancer over time.

There are several types of colon polyps:

1. Adenomatous polyps (adenomas): These are the most common type and have the highest risk of becoming cancerous.
2. Hyperplastic polyps: Generally considered low risk for cancer.
3. Inflammatory polyps: Often associated with inflammatory bowel diseases.
4. Hamartomatous polyps: Typically found in certain genetic syndromes.

Are all colon polyps cancerous? No, most colon polyps are benign. However, certain types, particularly adenomatous polyps, have a higher risk of developing into cancer if left untreated. This is why regular screening and removal of polyps is essential for colorectal cancer prevention.

Diverticular Disease: From Diverticulosis to Diverticulitis

Diverticular disease refers to a spectrum of conditions involving diverticula in the colon. Diverticulosis is the presence of diverticula without inflammation, while diverticulitis occurs when these pouches become inflamed or infected.

The development of diverticular disease typically follows this progression:

1. Formation of diverticula (diverticulosis)
2. Asymptomatic diverticulosis
3. Symptomatic uncomplicated diverticular disease
4. Acute diverticulitis
5. Complicated diverticulitis (with abscess, perforation, or fistula)

Is diverticulosis always symptomatic? No, many people with diverticulosis remain asymptomatic. However, when symptoms do occur or inflammation develops, it can lead to diverticulitis, which typically causes more severe symptoms and requires medical attention.

Risk Factors and Epidemiology: Who’s at Risk?

Understanding the risk factors for colon polyps and diverticular disease is crucial for prevention and early detection. While some risk factors are shared, others are specific to each condition.

Common risk factors for colon polyps include:

• Age (over 50)
• Family history of polyps or colorectal cancer
• Smoking
• Obesity
• Sedentary lifestyle
• High-fat, low-fiber diet

Risk factors for diverticular disease include:

• Age (increases with age)
• Low-fiber diet
• Lack of physical activity
• Obesity
• Smoking

Do colon polyps and diverticular disease share any risk factors? Yes, several risk factors are common to both conditions, including age, diet, and lifestyle factors. This suggests that similar preventive measures may be beneficial for reducing the risk of both colon polyps and diverticular disease.

Symptoms and Diagnosis: Recognizing the Signs

Identifying the symptoms of colon polyps and diverticular disease is crucial for early detection and treatment. While some symptoms may overlap, there are distinct differences in how these conditions present.

Common symptoms of colon polyps:

• Rectal bleeding
• Change in bowel habits
• Abdominal pain or cramping
• Iron deficiency anemia (in cases of chronic bleeding)

Symptoms of diverticulitis:

• Severe abdominal pain, usually on the left side
• Fever
• Nausea and vomiting
• Constipation or diarrhea
• Bloating

How are these conditions diagnosed? Colon polyps are typically discovered during colonoscopy or other imaging studies. Diverticulitis is often diagnosed based on symptoms, physical examination, and confirmed with imaging tests such as CT scans.

Treatment Approaches: Managing Colon Polyps and Diverticulitis

The treatment strategies for colon polyps and diverticulitis differ significantly due to the nature of these conditions. Understanding the available treatment options is essential for patients and healthcare providers alike.

Treatment for colon polyps:

1. Polypectomy: Removal of polyps during colonoscopy
2. Endoscopic mucosal resection: For larger polyps
3. Surgical resection: In cases of very large polyps or suspected cancer
4. Follow-up colonoscopies: To monitor for recurrence

Treatment for diverticulitis:

1. Mild cases: Oral antibiotics, liquid diet, and rest
2. Severe cases: Hospitalization, IV antibiotics, and bowel rest
3. Complications: Surgical intervention may be necessary
4. Chronic management: High-fiber diet and lifestyle modifications

Can lifestyle changes help manage both conditions? Yes, adopting a high-fiber diet, maintaining a healthy weight, and regular exercise can be beneficial for both preventing colon polyps and managing diverticular disease.

Prevention Strategies: Reducing Your Risk

While some risk factors for colon polyps and diverticular disease are beyond our control, there are several preventive measures that can significantly reduce the likelihood of developing these conditions.

Preventive strategies for colon polyps:

• Regular colorectal cancer screenings
• Maintaining a healthy weight
• Eating a diet rich in fruits, vegetables, and whole grains
• Limiting red and processed meats
• Exercising regularly
• Avoiding excessive alcohol consumption
• Quitting smoking

Preventive measures for diverticular disease:

• High-fiber diet (aim for 25-30 grams per day)
• Staying well-hydrated
• Regular physical activity
• Maintaining a healthy weight
• Avoiding smoking

How effective are these preventive measures? While no prevention strategy is 100% effective, adopting these lifestyle changes can significantly reduce the risk of developing both colon polyps and diverticular disease. Regular screenings are particularly important for early detection and prevention of colorectal cancer.

The Relationship Between Colon Polyps and Diverticular Disease

While colon polyps and diverticular disease are distinct conditions, research suggests there may be some connections between them. Understanding these potential relationships can provide insights into the overall health of the colon and guide preventive strategies.

Some studies have found associations between the presence of diverticulosis and an increased risk of colon polyps or colorectal cancer. For example:

• A study by Stefansson et al. (1993) found an increased risk of left-sided colon cancer in patients with diverticular disease.
• Morini et al. (1988) observed an association between colonic diverticula and adenomas.

However, it’s important to note that the exact nature of this relationship is not fully understood and may be influenced by shared risk factors rather than a direct causal link.

Do all patients with diverticulosis need to be screened for colon polyps? While the presence of diverticulosis doesn’t automatically necessitate additional polyp screening beyond standard recommendations, it’s essential to follow general colorectal cancer screening guidelines and discuss any concerns with a healthcare provider.

Shared Risk Factors and Preventive Measures

The overlap in risk factors for colon polyps and diverticular disease suggests that similar lifestyle modifications may be beneficial in preventing both conditions. These shared preventive measures include:

1. Increasing dietary fiber intake
2. Maintaining a healthy body weight
3. Engaging in regular physical activity
4. Limiting red and processed meat consumption
5. Avoiding smoking
6. Moderating alcohol intake

By adopting these lifestyle changes, individuals may simultaneously reduce their risk of developing both colon polyps and diverticular disease.

The Role of Inflammation

Chronic inflammation in the colon may play a role in the development of both colon polyps and diverticular disease. Inflammatory processes can contribute to:

• Alterations in the colon’s mucosal lining, potentially leading to polyp formation
• Weakening of the colon wall, which may contribute to diverticula formation
• Increased risk of complications in both conditions

This shared inflammatory component underscores the importance of anti-inflammatory dietary choices and lifestyle factors in maintaining colon health.

Geographical and Demographic Variations

Interestingly, the prevalence of colon polyps and diverticular disease varies across different populations and geographical regions. For example:

• Western countries typically have higher rates of left-sided diverticular disease, while Asian countries more commonly see right-sided diverticulosis.
• The incidence of both conditions tends to increase with age in most populations.
• Dietary patterns and lifestyle factors specific to certain regions may influence the prevalence of both colon polyps and diverticular disease.

These variations highlight the complex interplay between genetic, environmental, and lifestyle factors in the development of colon polyps and diverticular disease.

Future Directions in Research and Treatment

As our understanding of colon polyps and diverticular disease continues to evolve, new avenues for research and treatment are emerging. These developments hold promise for improved prevention, diagnosis, and management of both conditions.

Advances in Screening and Diagnostic Techniques

Emerging technologies are enhancing our ability to detect and characterize colon polyps and diverticular disease:

• Artificial intelligence-assisted colonoscopy for improved polyp detection
• Advanced imaging techniques for better characterization of diverticular disease
• Non-invasive screening methods, such as stool-based DNA tests and virtual colonoscopy

These advancements may lead to earlier detection and more personalized treatment approaches.

Microbiome Research

The role of the gut microbiome in colon health is an area of intense research. Studies are investigating:

• How the microbiome may influence the development of colon polyps and diverticular disease
• Potential probiotic or prebiotic interventions to promote colon health
• The impact of diet on the microbiome and its relation to colon conditions

Understanding the microbiome’s role may lead to new preventive strategies and treatments for both colon polyps and diverticular disease.

Targeted Therapies

Research into the molecular mechanisms underlying colon polyp formation and diverticular disease progression may lead to more targeted therapies:

• Development of drugs that specifically inhibit polyp growth
• Targeted anti-inflammatory treatments for diverticulitis
• Personalized medicine approaches based on genetic profiles

These targeted therapies could potentially offer more effective treatments with fewer side effects.

Lifestyle Interventions

Continued research into lifestyle factors may refine our understanding of preventive measures:

• Optimal dietary patterns for preventing both colon polyps and diverticular disease
• Specific exercise regimens that promote colon health
• Stress reduction techniques and their impact on colon conditions

Evidence-based lifestyle recommendations could empower individuals to take proactive steps in maintaining colon health.

Long-term Management Strategies

For individuals diagnosed with colon polyps or diverticular disease, research is focusing on optimizing long-term management:

• Determining ideal surveillance intervals for patients with a history of polyps
• Developing strategies to prevent recurrent diverticulitis
• Investigating the potential benefits of ongoing dietary supplements or medications

These strategies aim to improve quality of life and reduce the risk of complications for affected individuals.

As research in these areas progresses, we can anticipate more effective prevention strategies, improved diagnostic accuracy, and enhanced treatment options for both colon polyps and diverticular disease. This ongoing scientific inquiry underscores the importance of staying informed about the latest developments in colon health and maintaining open communication with healthcare providers.

Association between colonic polyps and diverticular disease

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A 10-Year Retrospective Study in 13680 Patients

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AbstractBackgroundMethodsResultsDiscussionData AvailabilityConflicts of InterestReferencesCopyrightRelated Articles

Introduction. Shared by certain epidemiological and etiological characteristics, diverticulosis and colorectal cancer (CRC) as well as colonic polyps has long been linked. This association was studied in several heterogeneous studies but has reported inconsistent results. Clarifying the association is clinically relevant for endoscopist awareness and potential modification of screening and surveillance intervals for diverticulosis patients. Methods. In this retrospective single-center study, patients diagnosed with diverticulosis on colonoscopy over a 10-year period were included. Each diverticulosis patient was matched with 1 control by age, gender, setting (inpatient/outpatient), and procedure’s indication. CRC and polyp detection rates were recorded and compared between the groups before and after adjustment for bowel preparation quality and exam completion. CRC location was recorded and compared between groups. Results. A cohort of 13680 patients (6840 patients with diverticulosis and 6840 matched controls) was included. Diverticulosis was located mainly to the sigmoid and left colon (94.4%). The CRC diagnosis rate was lower in the diverticulosis group (2% vs. 4.5%, , , and ). Moreover, location of CRC was unrelated to diverticulosis location, as more CRCs in the diverticulosis group were located proximal to the splenic flexure as compared to the control group (42.5% vs 29.5%, respectively; ). Diverticulosis, however, was associated with an increased polyp detection rate compared to controls (30.5% vs. 25.5%; , , and ). Conclusion. We demonstrated that diverticulosis was not associated with an increased risk for CRC. A possible increased polyp detection rate, however, warrants further evaluation in large prospective studies.

1. Background

Diverticulosis is considered as one of the most common and burdensome GI disorders [1, 2]. The underlying pathological mechanisms resulting in diverticular formation of a colonic wall is still largely unknown. Diverticula develop at well-defined points of weakness in the circular muscle of colon and are likely to be the result of complex interactions between environmental and heritable factors including diet, increased age, and decreased colonic motility, among others [3, 4]. Typically, diverticulosis is identified incidentally at colonoscopy or imaging studies performed for various indications, and the majority of patients with diverticulosis remain asymptomatic throughout their lifetime [5].

Several observations hold that certain epidemiological and etiological characteristics are shared between colonic diverticulosis and colorectal cancer, suggesting a possible association between these two conditions. The prevalence of these conditions is markedly on the rise in the last decades, and they both are detected frequently in aged people as well as western population and industrialized countries [6–8]. Western diet, namely, low dietary fiber and high total fat, has been largely regarded to play a major role in the pathogenesis and was epidemiologically associated with an increased risk of both conditions [9–13].

The abovementioned connection is of great clinical relevance, as several reports demonstrated that patients with diverticular disease have a higher risk of harboring colonic cancer [14–16]. Above and beyond, one meta-analysis demonstrated that diverticular disease was associated as well with increased detection of colorectal adenomas [17].

However, data are still controversial and inconclusive as other recent studies failed to confirm this association [18–20]. Moreover, the vast majority of the studies inspecting a possible link between both conditions were limited by small patient numbers and did not account for multiple confounders that are known to affect CRC and polyp detection such as patients’ demographics, procedure’s indication, setting, quality of bowel preparation, and exam completion.

Taken together, unraveling the dilemma and clarifying the association between both conditions appear to be clinically relevant, as modifying screening or surveillance intervals for CRC and polyp follow-up may be warranted accordingly in patients with diverticular disease.

The present study is aimed at comparing the CRC diagnosis rate and location as well as polyp detection rate between patients with diverticular disease and a matched group without diverticulosis with adjustment for abovementioned confounders.

2. Methods and Settings

We conducted a retrospective, large cohort study, which examined consecutive patients who underwent colonoscopies over a 10-year period within the gastroenterology department at the Hillel Yaffe Medical Center, a university-affiliated hospital in Israel. All patients’ data were collected from our department’s electronic record system. We searched endoscopy reports to identify all patients with a diagnosis of diverticulosis to create a study group. For a control group, each patient from the study group was matched with 1 control patient by age, gender, setting (inpatient/outpatient), and procedure’s indication. Patients were excluded if they were less than 18 years, had prior diagnosis of colon cancer, or if full data set is missing. Endoscopy findings including cancer diagnosis and location as well as polyp detection were recorded in both groups. Diverticulosis location was documented as well in the diverticulosis group. Whenever an endoscopic diagnosis of colorectal cancer was encountered, histology reports were reviewed to confirm diagnosis.

We compared the rate of CRC and polyp diagnosis between both groups and use multivariable analysis to adjust for adequacy of bowel preparation (adequate/inadequate) and depth of examination (cecal intubation confirmed or not), in order to identify independent association of diverticulosis with CRC and polyp detection. CRC location was documented according to endoscopy reports, and we compared its location between both groups. Diverticulosis and CRC location was classified as proximal (proximal to splenic flexure) or distal (splenic flexure or distal). The local institutional Helsinki ethics board approved the study and granted exemption from informed consent in this retrospective study as patients were receiving standard care without relation to the study.

3. Statistical Analysis

This statistical analysis is dealing with cohort of “big data” (40128 patients), of them 6840 patients with diverticulosis (study group). We used the Propensity Score Matching in R program version 3. 3 to divide the total cohort to 1 : 1 ratio (study and control group). Descriptive statistics in terms of mean, SD, and percentiles were preformed to the whole parameters in the study. Differences between the two groups (diverticulosis diagnosed vs. matched group) in the quantitative parameters were demonstrated by -test. For the categorical parameters, we used fisher exact tests. Multivariate logistic regression model was used to determine the effect of the independent parameters associated with CRC. SPSS version 25 was also used for statistical analysis. was considered as significant.

4. Results

We included a large cohort of 40128 patients who underwent colonoscopy at our hospital. We searched endoscopy reports and identified 6840 patients (17%) with diverticulosis diagnosed during the study period. A matched group of 6840 control patients (at 1 : 1 ratio) was included for final analysis. Baseline characteristics of both groups were similar and are provided in Table 1. The overall mean age was years (range: 18-101), with a slight male predominance (52. 1%). The vast majority of the procedures (78.4%) were performed in the outpatient setting. Procedures’ indications did not differ significantly between groups. The most common indications for colonoscopy were abdominal pain and diarrhea (21.1%), rectal bleeding (14.2%), and anemia (13.2%).

The CRC diagnosis rate was lower in the diverticulosis group (2% vs. 4.5%; ) while the polyp detection rate was surprisingly higher (30.5% vs. 25.5%; ) as compared to the matched group (Table 2). Cecal intubation rate (92.8% vs. 84.1%; ), adequate bowel preparation rate (90.7% vs. 84.1%; ), and terminal ileum intubation rate (2.2% vs. 1.6%; and ; ) were significantly higher in the diverticulosis group (Table 2). Multivariate analysis (Table 3) to account for these variables revealed similar trends as diverticulosis patients were associated with less CRC diagnosis (, , and ) but increased polyp detection rate (, , and ).

Diverticulosis and CRC locations are demonstrated in Table 4. Diverticulosis was located mainly to the distal colon (94. 4%). Location of CRC was unrelated to diverticulosis location, as more CRCs in the diverticulosis group were located proximally compared to the control group (42.5% vs. 29.5%, respectively; ).

5. Discussion

The current study was designed to clarify several aspects of diverticulosis and its possible association with CRC and polyp diagnosis. This association has long been studied in observational, cross-sectional, and case-control studies and has reported inconsistent results. Moreover, small patient numbers and heterogeneous study design contributed to conflicting conclusions. In the current study, we included a large cohort over a 10-year period and performed group matching followed with multivariate analysis in order to account for as many confounders as possible that may have influenced results of preceding studies.

We found that diverticulosis patients were not associated with an increased rate of CRC diagnosis compared to a matched group (2% vs. 4.5%; , , ). Our findings confirm the findings from other recent studies that diverticulosis is not associated with increased CRC diagnosis. A nationwide case-control study found that diverticular disease does not increase the risk of colon cancer in the long term, and a history of diverticular disease does not affect colon cancer mortality [18]. Our findings are also in concordance with a study by Meurs-Szojda et al. on more than 4200 colonoscopies which demonstrated a negative correlation between colon cancer and diverticulosis [21].

Moreover, we provided detailed location of diverticulosis and colon cancer in our cohort. Similar to different reports in western population [6, 7, 9], diverticulosis was located predominantly to the distal colon as more than 94% of diverticula were located to sigmoid and descending colon. In this regard, not only we demonstrated that CRC was located into sigmoid and descending colon in less than 35% but also we showed that more CRCs in the diverticulosis group were located proximally compared to the control group (Table 3) (42.5% vs. 29.5%, respectively; ). Consistent findings were reported by Cooper et al. who showed that diverticulosis associated interval cancers were somewhat more likely to be in the proximal colon and less likely to be in the distal colon [15]. Taken together, these findings reinforce the conclusion that CRC and diverticulosis are unrelated.

One worth mentioning finding in this study, however, is the increased polyp detection rate in diverticulosis patients (30.5% vs. 25.5%; 2, , ). This observation is supported by several other studies reporting that patients with diverticulosis have a higher risk of colorectal polyps as compared to those without [22, 23]. One meta-analysis found a significant 1.67-fold increased odds of developing adenomas in patients with diverticulosis [17]. Unfortunately, we were unable to determine the location and histologic type of these polyps in the current study. However, given the lower CRC diagnosis rate in the diverticulosis patients, this may point out that the majority of the detected polyps were of low dysplastic progression potentials (diminutive/hyperplastic polyps), thus explaining the low CRC diagnosis albeit the high PDR. Nevertheless, this observation needs further validation by a large prospective cohort study.

Furthermore, we demonstrated that diverticulosis has no significant effect on the outcome of colonoscopy. Linked with suboptimal bowel preparation, it is thought that diverticulosis may cause technical difficulty to perform a complete colonoscopy as a result of a spastic colon and luminal narrowing [24–26]. However, we demonstrated the contrary as quality indicators such as the cecal intubation rate (92.8% vs. 84.1%; and ; ) and the adequate bowel preparation rate (90.7% vs. 84.1%; and ; ) as well as the terminal ileum intubation rate (2.2% vs. 1.6%; and ; ) which were even better in diverticulosis patients compared to those without. Similar findings were reported by Gohil et al. who found that diverticulosis did not adversely affect the cecal intubation rate, withdrawal times, or sedation requirements [27].

One of the strengths of the current study includes the large number of participants involved as well as the inclusion of multiple factors such as procedures’ settings and indications reflecting real daily practice. Our study has limits inherent in its retrospective nature. Besides, other possible factors that may have affected endoscopy findings such as withdrawal time and variable endoscopist experience could not be obtained and were not included.

In conclusion, diverticulosis apparently is not linked with an increased risk of CRC but is possibly associated with an increased polyp detection rate. Prospective studies to clarify these findings are warranted.

Data Availability

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Conflicts of Interest

The authors certify that they have no affiliations with or involvement in any organization or entity with any financial or nonfinancial interest in the subject matter or materials discussed in this manuscript. The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

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Copyright

Copyright © 2019 Fadi Abu Baker et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Diverticular disease – treatment in St. Petersburg. Diverticular disease of the colon

Diverticular disease is a chronic disease that occurs due to the formation of a sac-like protrusion (diverticulum) in the intestinal wall, and, as a result, a congestive process and the development of inflammation.

Sometimes there is a single diverticulum, but, as a rule, most often people have multiple protrusions in one of the sections of the intestine.

Diverticula are divided into “true” and “false”, as well as “congenital” and “acquired”.

• True diverticula are most often congenital – due to a direct violation of the structure of the intestine. One of the features of a true diverticulum is that the walls of the diverticulum have all the layers characteristic of the intestine. True diverticula, for example, include Meckel’s diverticulum: a protrusion of the wall of the small intestine at the confluence of an unclosed embryonic vitelline duct into it as an anomaly of development.
• False diverticula are acquired and represent a bulging of the intestinal mucosa outward through thinned places in its muscular layer.

As a rule, acquired diverticula are multiple and rarely occur in a single number.
Diverticulosis is a change in the intestinal wall with the presence of multiple diverticula in it without inflammatory processes occurring in them and not manifesting themselves clinically.
If an inflammatory process develops in the diverticulum, they speak of diverticulitis and, as a result, the development of diverticular disease.

Incidence of diverticular disease

Of all the diseases of the colon, intestinal damage by diverticula is one of the most common in the modern world. The frequency of diverticular disease reaches an average of 20% in European countries; moreover, in older age groups of the population (60–80 years), the frequency increases, reaching 40–50%, and among patients over the age of 80, the incidence reaches 60–65%. In our country, diverticula of the large intestine are found in approximately 17-28% of gastroenterological patients. The frequency of the disease in men and women is approximately the same.

Classification of diverticular disease

• Uncomplicated. This form is detected incidentally during X-ray or endoscopic examination of the intestine. In blood tests, as a rule, no changes are found. An examination must be carried out to assess the prevalence of intestinal damage, predict the course of the disease and choose a method for preventing complications or treatment.
• Complicated with acute inflammatory process (diverticulitis, diverticular infiltrate, diverticulum perforation, abscess, peritonitis), chronic inflammatory process, and bleeding. The chronic process includes situations when the inflammation cannot be eliminated within 6 weeks, or it occurs again. In severe cases, an infiltrate, narrowing of the intestine, or a fistula from a destroyed diverticulum may form.

Causes of diverticula

The occurrence of this disease does not have any specific cause. It is due to a combination of many factors. There is an opinion about the predisposition of some people to this disease due to congenital underdevelopment of the muscular layer of the intestinal wall. As a result, they develop diverticula with age or under the influence of any factors.

Congenital predisposition plays a role in people with hereditary connective tissue dysplasia syndromes (Marfan, Ehlers-Danlos syndromes, when there is a deficiency of collagen in the human body), a combination of diverticular disease of the large intestine with diseases associated with a decrease in elasticity and strength of the connective tissue (hernias) is also common. , varicose disease, visceroptosis, polycystic).
However, congenital inferiority of tissues is not the only reason for the occurrence of pathological changes in the intestinal wall.

The high incidence of diverticular disease in the elderly is associated with a gradual decrease in the tone of the colon wall as the body ages. Diverticular disease is a chronic disease that occurs due to the formation of a sac-like protrusion (diverticulum) in the intestinal wall, and, as a result of a congestive process, the development of inflammation in them. The muscular layer of the colon becomes thicker and less elastic. The supporting connective tissue loses elasticity, and the intestinal wall becomes less extensible. Therefore, diverticula in people of the older age group appear more often than in young people.

It is also known that diverticula occur significantly more often with a decrease in plant fibers and fiber in the diet. Therefore, in vegetarians, diverticular disease occurs 3 times less often than in people who limit the intake of vegetables and fruits. Foods low in fiber poorly stimulate intestinal motility, slow down the movement of contents through the large intestine, which increases the absorption of water and, as a result, constipation develops. The retention of feces in the intestines, combined with a violation of the normal intestinal microflora, leads to inflammation and the progression of diverticular disease. This can also explain the more frequent occurrence of diverticula in the sigmoid colon (constipation in this case plays the role of a resolving factor).

The clinical picture in about two out of three cases is not accompanied by any complaints (asymptomatic diverticulosis), the pathology is detected by chance during endoscopic or X-ray studies. Most often, the first signs of diverticular disease are pain and functional disorders in the form of constipation or diarrhea. There are complaints of regularly recurring pain in the abdomen, more often in the left iliac region or lower sections, disappearing after defecation. Pains of varying intensity can exist for a long time – from several weeks to months. Increased pain is sometimes accompanied by fever, signs of intoxication may appear (dry mouth, nausea, tachycardia). Also, bloating and profuse gas separation, various dyspeptic disorders are often noted, which is sometimes hidden under the guise of irritable bowel syndrome.

Complications of diverticular disease of the colon

• Diverticulitis. This is an acute inflammation that occurs in diverticula in a quarter of patients with diverticulosis. Signs of the development of inflammation can be the appearance of pain and tension in the muscles of the anterior abdominal wall, fever, chills, bloating, stool disorders in the form of diarrhea or constipation.

• Diverticulum perforation. Against the background of the inflammatory process in the diverticulum, part of its wall may collapse, and the intestinal contents enter the abdominal cavity. At the same time, local or diffuse peritonitis develops. With perforation (rupture of the wall) of the diverticulum into the retroperitoneal tissue or the space between the sheets of the mesentery, infiltrates or abscesses appear.

• Bleeding. Occurs in approximately 25% of patients with diverticular disease. For many people, it may be the first and only manifestation of the disease. Usually bleeding is associated with ulceration of the wall of the diverticulum as a result of chronic inflammation. Also, in place of a fecal stone, a pressure sore may form with damage to the blood vessel. The intensity of bleeding can be different: from a slight admixture of blood in the feces (sometimes there is hidden bleeding, which is manifested by a gradual increase in anemia), to massive profuse bleeding, accompanied by collapse and even leading to death.

• Intestinal obstruction. The cause of intestinal obstruction may be an inflammatory process around the diverticulum or adhesions, leading to deformation of the intestine and disruption of the movement of stool along it. In rare cases, invagination (screwing) of a part of the intestine with a diverticulum or spasm of smooth muscles may occur.

• Intestinal fistulas. May occur when a diverticulum is perforated and an abscess ruptures into a nearby organ (the so-called “internal fistulas”). Men are more likely to develop fistulas with the bladder, women – with the vagina. With the formation of an entero-vesical fistula, air or an admixture of feces may appear in the urine.

Diagnosis of diverticular disease

• Irrigoscopy is an x-ray examination in which the colon lumen is filled with a contrast suspension and its condition is assessed during filling and after bowel emptying.
• Colonoscopy reveals the presence of multiple diverticula, signs of inflammation or intestinal bleeding, and may also be helpful in detecting associated lesions such as polyps and cancer.
• MSCT (multispiral computed tomography). Appropriate for the differential diagnosis of diverticulitis and tumor lesions of the colon.

Treatment

The main goal of treating diverticular disease is to normalize bowel function, prevent disease progression and complications, and relieve exacerbations.

Diet

Since diverticular disease is much more likely to occur in people who restrict their dietary intake of vegetables and fruits, all patients with diverticulosis should use foods high in vegetable fiber and pectin. Wheat bran is very useful (especially coarse bran), which significantly reduces the pressure inside the intestine and accelerates the speed of movement of the contents through the intestine.

Be sure to exclude all foods that cause increased gas formation (legumes, lentils, grapes, sauerkraut, butter and yeast dough, onions) and constipation (blueberries, rice). It is also advisable to exclude seeds, fruits with a large number of grains and excessively coarse fiber (persimmon, pineapple, turnip, radish, radish).

Drug treatment

• In an uncomplicated course, the disease does not require the use of drugs. The need to take medication arises depending on the clinical manifestations.
• Antispasmodics are used for abdominal pain.
• When dysbacteriosis is detected, drugs that help restore normal intestinal microflora.
• With persistent constipation, drugs are taken to enhance the motility of the stomach and intestines: lactulose preparations, vaseline or olive oil orally or in microclysters.
• In case of diverticulosis with clinical manifestations of inflammation, it is necessary to use the whole range of therapeutic measures: laxative diet, antispasmodics; drugs that regulate the motor function of the intestine, and drugs that normalize the composition of the bacterial flora of the intestine.

Surgical treatment

The need for surgical treatment for diverticular disease can arise both urgently and in a planned manner. This happens when complications occur that can threaten a person’s life (bleeding, perforation, peritonitis).
Planned surgical treatment is always aimed at eliminating the threat of such complications. The choice of the operation method in each specific case depends on the prevalence of the process, inflammatory changes in the diverticula, the condition of the intestinal wall and surrounding tissues, the presence of inflammation outside the intestinal lumen or peritonitis. It is important to take into account comorbidities often observed in the elderly. As a rule, resection (removal) of the affected part of the large intestine is performed in a planned manner with simultaneous imposition of an anastomosis.
Surgical treatment in our Clinic is performed laparoscopically, which allows patients to quickly return to active life. A planned operation is always performed during the period of remission, 2-3 months after the removal of an acute attack of the disease. Colon fistulas are an indication for planned surgical treatment, since it is not possible to achieve their self-healing, and chronic inflammation leads both to the development of rough scars that disrupt the passage of intestinal contents, and to the development of chronic intoxication and a decrease in immunity. With the formation of intestinal-vesical fistulas, there is a threat of developing an ascending urinary tract infection and kidney damage.

• Surgical removal of fistulas is a complex surgical intervention requiring the participation of highly qualified specialists. In our clinic, when planning such interventions, if necessary, related specialists (urologists, gynecologists, endoscopists) are involved. In intestinal bleeding, conservative treatment (hemostatic therapy) is most often prescribed or endoscopic hemorrhage is performed. The operation is performed only when conservative methods of treatment are ineffective.
• Surgical treatment of diverticulum perforation. If the operation is urgent, a colostomy may be used to reduce the risk of postoperative complications. Reconstructive surgery with closure of the colostomy and restoration of intestinal continuity is performed after the inflammatory process subsides (after about 3 months).

Dispensary observation

Patients with diverticular disease should be regularly observed by a gastroenterologist or coloproctologist. Colonoscopy in the absence of complaints is performed at intervals of 1 time in 3 years.
If pain and other manifestations of the disease occur, the examination should be completed as soon as possible. With frequent periodic recurrences of diverticulitis, regular anti-relapse courses of treatment are indicated.

Forecast

The prognosis is usually favorable if the disease is detected in a timely manner, the necessary preventive and therapeutic measures are started, provided that the patient complies with all the necessary recommendations.
However, if the need for prevention is ignored, diverticular disease can lead to the development of severe complications that threaten the life and health of the patient. Moreover, the disease is more common among older people who have a variety of concomitant diseases and lower body resistance.

Prevention

Among preventive measures, a varied and balanced diet is of primary importance. Due to the fact that a diet low in plant fibers predisposes to the formation of diverticula, in order to reduce the risk of developing the disease, it is necessary to include plant-based products in large quantities.
Since the timely detection of diverticula plays an important role, it is extremely important to undergo a preventive examination and regularly perform an endoscopic examination of the intestine.

Diverticular disease (diverticulosis) of the colon

What is diverticular disease (diverticulosis) of the colon?

Diverticula (lat. diverticulum – literally “branch”, “road to the side”) are sac-like protrusions of all layers of the colon wall or only the mucous membrane and submucosal layer through a defect in the muscular layer.

Figure 1. Cross section of the colon. Diverticulum

Colon diverticulosis is a condition in which there is at least one diverticulum in the colon.

Figure 2. Diverticulosis of the left departments of the colon of the colon

diverticular disease – a disease characterized by clinical manifestations of the inflammatory process and its possible complications – abscesses, perforation of diverticuls, the formation of fistulas, peritonitis, as well as bleeding.

What is the anatomy of the large intestine?

To better understand the pathogenesis of diverticular disease, consider the anatomy of the colon. The large intestine is a hollow muscular organ – a “tube” located in the abdominal cavity in the shape of a “horseshoe”, and is the final section of the gastrointestinal tract, where the formation and evacuation of feces occurs. It consists of the following sections: appendix, cecum, ascending colon, transverse colon, descending colon, sigmoid colon, and rectum.

The wall of the large intestine consists of four layers: mucous, submucosal, muscular and serous.

The mucosa of the large intestine is its inner membrane facing the lumen. It is a thin layer of cells – a cylindrical epithelium. The mucous membrane lies on its own plate, consisting of loose fibrous connective tissue, in which the glands, blood and lymphatic vessels are located. In the deepest layer of the mucous membrane, on the border with the submucosa, there is a muscular plate of the mucous membrane. The epithelium of the mucous membrane performs an integumentary function, is a link between the wall of the large intestine and its lumen – it ensures the absorption of water, the synthesis of B and K vitamins by intestinal bacteria, the formation of fecal masses and their preparation for evacuation, releasing the required amount of mucus.

The submucosa is the layer of the colon wall following the muscularis mucosa. The submucosa contains blood vessels that feed the intestinal wall and nerve plexuses that coordinate its contractions. Due to the submucosa, the mucosa can shift in relation to the next layers of the colon wall and form folds.

The muscle fibers of the intestinal wall are arranged both circularly and longitudinally. This layer acts as a framework, and also ensures the promotion of fecal masses due to contractions.

Outside, the large intestine is covered with a thin “film” – a serous membrane.

For a better understanding of the mechanism of diverticulum formation, one should also pay attention to the peculiarities of the blood supply to the colon wall.

The colon is nourished from the system of the superior and inferior mesenteric arteries, which originate from the aorta, the main vessel of our body. Their branches form a single marginal vessel that accompanies the large intestine throughout its entire length. Feeding branches depart from the marginal vessel, passing through the muscle layer and branching in the submucosa. With an increase in pressure inside the intestine, sections of the muscular layer through which the feeding vessels pass can serve as a “gateway” for the formation of diverticula.

How does diverticular disease manifest itself?

Uncomplicated diverticulosis is usually asymptomatic – you may not even notice the disease. Diverticula may be an incidental finding during a routine examination. In this situation, no special treatment is required. Recommendations include regular medical supervision, a diet high in fiber and low in refined carbohydrates, and regular physical activity and weight control.

The difficulty of timely detection of diverticular disease lies in the absence of specific symptoms. The clinical picture is presented mainly by cramping pains mainly on the left lower abdomen, increased gas formation, unstable stools with a tendency to constipation or with alternating constipation and diarrhea. Such complaints are mainly associated with dysmotility of the colon.

When they see a doctor, such patients are usually diagnosed with irritable bowel syndrome or dolichosigma, the patient is reassured, an abdominal ultrasound is recommended, and after light therapy, they are sent “home”.

However, in the event of such complaints, a colonoscopy is mandatory! The above symptoms can be manifestations not only of diverticular disease, but also of many other diseases of the colon, the timely detection of which can significantly improve the results of treatment.

Figure 3. Colonoscopy. Orifices of diverticula are visible

The clinical picture of diverticulitis is significantly different. Severe abdominal pain, bloating, lack of stool, may be accompanied by fever, nausea, and vomiting. Such complaints require urgent hospitalization in the coloproctology department, where patients receive antibacterial, anti-inflammatory therapy, and if this treatment is not effective, surgical intervention may be necessary.

The main cause of inflammation of a diverticulum – diverticulitis – is the ingress of dense fecal masses into it, unable to come back out. At this stage, inflammatory changes and the formation of an infiltrate (seal) of the surrounding tissues occur.

What causes diverticula?

Often at the doctor’s office, patients diagnosed with diverticular disease ask the question: “Why did this disease develop?” What are the causes of this disease? A large amount of information on the Internet does not always give a clear explanation. Let’s try to tell in more detail.

We believe that all the main causes of diverticular disease can be divided into two interrelated groups:

• Increased pressure in the intestinal lumen;
• Weakness of the intestinal wall.

Deficiency of vegetable fiber in the diet leads to a decrease in volume and an increase in the density of feces, which causes disturbances in the motor activity of the large intestine: it reacts even to slight irritation with chaotic contractions. Thus, short closed segments of the intestine with increased intraluminal pressure appear, which leads to bulging of the mucosa through the “weak” sections of the intestinal wall – the places where the blood vessels pass.

For a clear understanding of the formation of a diverticulum, we offer you an interesting comparison:

“The wall of the intestine is similar to the layered structure of a soccer ball – strong and hard skin on the outside, and a soft but elastic rubber chamber inside.

Now imagine that a hole, a hole, is formed in the outer hard shell of this ball. What will happen then? The high pressure inside the ball will push part of the soft and elastic inner rubber chamber outward: a pocket protruding outward is formed. This can be compared with a hernia on the abdomen – through a defect in the muscles, the contents “bulge out” outward.

Approximately the same thing happens with the colon with diverticulosis. If the pressure inside the intestinal lumen is large, and there are weak spots in the muscular layer, then the inner lining of the intestine tends outward through these holes, forming protrusions in the form of sacs. They are called diverticula.”

What tests should be performed if diverticular disease is suspected?

The first step in the diagnosis of diverticular disease without exacerbation is colonoscopy. With the help of a video camera inserted through the anus, more than a meter of the intestine is examined – the entire large intestine and the final section of the small intestine. Colonoscopy allows not only to see the presence of a diverticulum, but also to determine the size of its gate, the condition of the wall, and the exact localization. If other changes are found in the intestine, colonoscopy allows you to take a piece of tissue for examination – perform a biopsy with further histological examination in order to understand the microscopic structure of the changes. This study can be performed under light anesthesia, which allows you to completely save the patient from the discomfort associated with the procedure.

The “gold standard” for diagnosing diverticular disease is barium enema. This method allows you to determine the number of diverticula, their exact location, size and shape. The essence of the procedure is the introduction of a radiopaque preparation into the colon, after which a series of x-ray images are taken to assess the condition of the colon. In the presented photographs, the arrows indicate the orifices of the colonic diverticula. We marked with blue arrows multiple diverticula of the colon. This is what they look like on a CT scan.

Figure 4. Irrigoscopy. Diverticulosis of the colon

X-rays taken during irrigoscopy clearly show multiple diverticula of the colon. They look like sacs filled with radiopaque.

Equally important methods are ultrasound diagnostics and computed tomography. Due to its minimally invasiveness, ease of implementation, ultrasound diagnostics is very relevant at the stage of the initial examination. It allows you to see the presence of diverticula, identify indirect signs of their inflammation, such as infiltration, abscess, or suggest a generalized form – peritonitis.

In order to clarify the data obtained during the ultrasound examination, in case of doubt and to clarify the diagnosis, a spiral computed tomography is performed. Virtual computed tomography allows you to recreate a three-dimensional image of the colon, including the affected areas. Using this technique, you can accurately determine the boundaries of the infiltrate or abscess, other organs involved in the inflammatory process.

Figure 5. Virtual colonoscopy. Orifice of diverticulum

How to treat diverticular disease, diverticulosis and diverticulitis?

Medical treatment

When treated promptly, diverticulitis responds very well to medical treatment. Inflammatory changes are completely cured with the help of antibacterial and anti-inflammatory therapy.

In case of complications in patients, the treatment method should be selected as less traumatic and minimally invasive. The infiltrate can be completely cured with medication. The abscess can be punctured under ultrasound or CT guidance.

Surgical treatment

In case of peritonitis and the need for surgery in the early stages of the disease, intervention can be performed laparoscopically – through small punctures. Unfortunately, the development of fecal peritonitis usually requires a laparotomy – a “large incision” for thorough washing and examination of the abdominal cavity.

Surgical treatment of diverticular disease outside periods of exacerbation is especially important for active travelers, as well as patients living far from district centers. If an exacerbation of the disease occurs away from centers where you can get quality medical care, the consequences can be the most unpleasant. If there are three or more attacks of diverticulitis per year, the patient should contact the coloproctology department to determine the optimal treatment tactics outside the exacerbation period. If surgical treatment is necessary, the operation of choice in this case is the laparoscopic removal of the affected area of ​​the colon and the rectosigmoid junction as one of the causes of increased pressure in the intestinal lumen. Removal of the stoma (even temporarily) in this case is not required.

When is emergency surgery needed?

Urgent surgery is necessary if purulent inflammation spreads to the peritoneum, i.e. peritonitis, which is a life-threatening complication.

Is the intestine always exposed to the anterior abdominal wall during emergency surgery?

This issue is decided individually for each patient. Of course, the formation of a stoma is not shown in 100% of cases.

Benefits of minimally invasive surgery for diverticulosis and diverticulitis

The main advantages of minimally invasive operations are a satisfactory cosmetic effect (there are no large scars on the anterior abdominal wall) and a faster patient recovery after surgery.