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Bone marrow test symptoms. Bone Marrow Test: Purpose, Procedure, and What to Expect

What is a bone marrow test. How is a bone marrow test performed. Why might you need a bone marrow test. What are the different types of bone marrow biopsies. How long does a bone marrow test take. What are the potential side effects of a bone marrow test. How to prepare for a bone marrow biopsy.

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Understanding Bone Marrow and Its Importance

Bone marrow is the spongy tissue found inside our bones, responsible for producing blood cells. This crucial component of our skeletal system plays a vital role in maintaining our overall health. But what happens when doctors need to examine this hidden tissue more closely?

A bone marrow test, also known as a bone marrow biopsy, is a medical procedure that allows healthcare professionals to examine the cells within your bone marrow. This test is essential for diagnosing various blood disorders and certain types of cancer.

The Function of Bone Marrow

Bone marrow serves as the body’s blood cell factory, producing:

  • Red blood cells (erythrocytes) – carry oxygen throughout the body
  • White blood cells (leukocytes) – fight infections
  • Platelets (thrombocytes) – help in blood clotting

Understanding the health of your bone marrow can provide crucial insights into various medical conditions affecting your blood and immune system.

The Purpose of a Bone Marrow Test

Why do doctors recommend bone marrow tests? These procedures are typically performed for several reasons:

  1. Diagnosing blood disorders
  2. Detecting blood cancers
  3. Monitoring cancer treatment effectiveness
  4. Assessing the spread of certain cancers
  5. Evaluating unexplained anemia or other blood count abnormalities

Bone marrow tests are particularly useful in diagnosing and monitoring conditions such as leukemia, lymphoma, and multiple myeloma. They can also help identify other disorders affecting blood cell production.

When Is a Bone Marrow Test Necessary?

Your doctor may recommend a bone marrow test if you have:

  • Unexplained persistent fever
  • Abnormal blood test results
  • Symptoms of blood disorders or certain cancers
  • A need for treatment response evaluation

Can a bone marrow test detect all types of cancer? While it’s particularly effective for blood-related cancers, it can also help identify other cancers that may have spread to the bone marrow.

Types of Bone Marrow Tests

There are two primary types of bone marrow tests, often performed together to provide comprehensive information:

1. Bone Marrow Aspiration

This procedure involves extracting a small amount of liquid bone marrow using a thin needle. The aspiration provides information about the cellular composition of the bone marrow.

2. Bone Marrow Trephine Biopsy

A trephine biopsy removes a small core of bone marrow tissue, typically 1-2 cm in length. This sample allows doctors to examine the structure and architecture of the bone marrow.

How do these tests differ in terms of information provided? The aspiration gives detailed information about individual cells, while the trephine biopsy offers insights into the overall structure and composition of the bone marrow.

The Bone Marrow Test Procedure: Step-by-Step

Understanding what happens during a bone marrow test can help alleviate anxiety and prepare you for the procedure. Here’s a detailed breakdown of the process:

  1. Preparation: You’ll be asked to sign a consent form and may need to change into a hospital gown.
  2. Positioning: You’ll lie on your side with your knees tucked up to your chest.
  3. Site Cleaning: The area where the sample will be taken (usually the hip bone) is cleaned with antiseptic.
  4. Local Anesthesia: A local anesthetic is injected to numb the area.
  5. Aspiration: A thin needle is inserted into the bone, and a small amount of liquid bone marrow is drawn out.
  6. Biopsy (if needed): A slightly larger needle is used to remove a small core of bone marrow tissue.
  7. Completion: The needle is removed, and pressure is applied to stop any bleeding.

How long does the entire procedure take? Typically, a bone marrow test lasts about 30 minutes from start to finish.

What to Expect During the Procedure

While the idea of a bone marrow test might seem daunting, understanding what to expect can help ease your concerns:

  • You may feel a brief sting when the local anesthetic is injected.
  • During the aspiration, you might experience a pulling sensation or brief, sharp pain.
  • The biopsy part of the procedure may cause a feeling of pressure or discomfort.
  • Some patients report feeling little to no pain, while others may find it more uncomfortable.

Is sedation available for bone marrow tests? While most procedures are performed under local anesthesia, some patients may be offered sedation to help them relax.

Potential Side Effects and Risks

Like any medical procedure, bone marrow tests carry some risks and potential side effects. However, serious complications are rare. Common side effects include:

  • Bruising at the biopsy site
  • Mild pain or discomfort for a few days
  • Minor bleeding

Less common risks may include:

  • Infection at the biopsy site
  • Prolonged bleeding
  • Allergic reaction to the local anesthetic

How long do side effects typically last? Most patients experience only minor discomfort that subsides within a few days. If you experience severe pain, fever, or excessive bleeding, contact your healthcare provider immediately.

Preparing for Your Bone Marrow Test

Proper preparation can help ensure a smooth and successful bone marrow test. Here are some steps to consider:

  1. Inform your doctor about any medications you’re taking, especially blood thinners.
  2. Discuss any allergies or previous reactions to anesthesia.
  3. Arrange for someone to drive you home after the procedure, especially if you’ll be receiving sedation.
  4. Wear comfortable, loose-fitting clothing.
  5. Follow any fasting instructions provided by your healthcare team.

Should you stop taking certain medications before the test? Always consult with your doctor before stopping any medications, as they will provide specific instructions based on your individual health needs.

Questions to Ask Your Doctor

Before undergoing a bone marrow test, consider asking your healthcare provider the following questions:

  • Why do I need this test?
  • How should I prepare for the procedure?
  • What type of anesthesia or sedation will be used?
  • How long will the procedure take?
  • What are the potential risks and side effects?
  • When can I expect to receive the results?
  • Will I need someone to drive me home afterward?

After the Bone Marrow Test: Recovery and Results

Once your bone marrow test is complete, you’ll enter the recovery phase. Here’s what you can expect:

Immediate Post-Procedure Care

  • You’ll be asked to lie flat for 10-15 minutes to help prevent bleeding.
  • A small bandage will be applied to the biopsy site.
  • You may be monitored for a short period to ensure there are no immediate complications.

At-Home Care

After leaving the hospital or clinic:

  • Keep the biopsy site clean and dry for 24 hours.
  • Avoid strenuous activities for a day or two.
  • Take pain relievers as recommended by your doctor if you experience discomfort.
  • Watch for signs of infection, such as fever, redness, or increased pain at the biopsy site.

How long does it take to fully recover from a bone marrow test? Most patients can return to their normal activities within 24-48 hours.

Getting Your Results

The timeline for receiving your bone marrow test results can vary:

  • Preliminary results may be available within a few days.
  • Complete results, including detailed analysis, typically take 1-2 weeks.
  • Your doctor will schedule a follow-up appointment to discuss the findings and any necessary next steps.

What information do bone marrow test results provide? The results can reveal the presence of abnormal cells, changes in bone marrow structure, and other indicators of various blood disorders or cancers.

Advances in Bone Marrow Testing and Future Developments

The field of bone marrow testing is continually evolving, with new techniques and technologies emerging to improve diagnosis and patient comfort. Some recent advancements include:

Imaging-Guided Biopsies

CT-guided or ultrasound-guided biopsies can improve accuracy and reduce the need for repeat procedures.

Molecular Testing

Advanced molecular techniques allow for more detailed analysis of bone marrow samples, providing insights into genetic mutations and helping to guide targeted therapies.

Liquid Biopsies

Research is ongoing into less invasive methods of detecting bone marrow abnormalities through blood tests, potentially reducing the need for traditional bone marrow biopsies in some cases.

How might these advancements change bone marrow testing in the future? As technology progresses, we may see more personalized, less invasive, and more informative bone marrow testing procedures becoming available.

The Role of Artificial Intelligence

AI and machine learning are being explored to:

  • Assist in the analysis of bone marrow samples
  • Improve diagnostic accuracy
  • Predict treatment outcomes based on bone marrow test results

These technological advancements hold the promise of more precise diagnoses and tailored treatment plans for patients undergoing bone marrow tests.

In conclusion, while bone marrow tests may seem daunting, they are crucial diagnostic tools that provide valuable information about your health. By understanding the procedure, its purpose, and what to expect, you can approach this test with confidence and peace of mind. As medical science continues to advance, we can look forward to even more efficient and less invasive methods of examining bone marrow in the future, further improving patient care and outcomes.

Bone marrow test | Tests and scans

What is a bone marrow test?

A bone marrow test is a way of testing cells from your bone marrow. Bone marrow is the spongy tissue inside your bones that makes blood cells.

Why do I need it?

To find out whether there are any cancer cells in the bone marrow. You might also have one to check whether treatment is working.

How do you have it and how long does it take?

You have a local anaesthetic injection to numb a small area on your hip. The doctor puts a needle into your hip to suck out some bone marrow. The test takes about 30 minutes. You should get your results within 1 or 2 weeks.

Are there any side effects?

Possible side effects can include bruising, bleeding, pain, infection or tingling in the legs.

You have a bone marrow test to check whether there are cancer cells in your bone marrow. Bone marrow is spongy tissue and fluid that is inside your bones. It makes your blood cells. Depending on your cancer type, this test can also check how well your treatment is working. 

A doctor or specialist nurse removes a sample of bone marrow cells or an area of bone marrow in one piece. This is usually from your hip. A specialist doctor can then look at the cells or tissue under a microscope.

You usually have the test in the outpatient department of the hospital. But you may have this on the ward if you are staying overnight in hospital (inpatient).

You’re usually awake for the test. You have a local anaesthetic to numb the area. Some people have medicine to make them drowsy (sedation).

Why might you have a bone marrow test?

Bone marrow tests are usually done for cancers that are most likely to affect the bone marrow, such as:

  • lymphomas
  • leukaemia’s
  • myeloma

But it can be done for any type of cancer. This is usually if your doctor thinks your bone marrow could contain cancer cells, or they need to rule this out for any reason.

Types of biopsy

There are 2 main types of bone marrow test: 

  • bone marrow aspiration
  • bone marrow trephine biopsy

Aspiration means the doctor or nurse draws some liquid bone marrow up into a syringe.

A bone marrow trephine biopsy means they remove a very thin 1 or 2cm long core of bone marrow in one piece.

You usually have both of these tests done at the same time. They give some of the same information to the doctor, but there are differences. The bone marrow trephine shows the structure of the bone marrow inside the bone, whereas the aspiration takes just the bone marrow cells.

What happens

Your doctor will give you information about the procedure and asks you to sign a consent form. This is a good time to ask any questions you have.

You might need to change into a hospital gown. You can usually keep your underwear on.

You lie on your side with your knees tucked up into your chest.

Your doctor or nurse cleans the area with some antiseptic fluid. This can feel cold.

You’ll then have an injection into the skin over the biopsy site (local anaesthetic) to numb the area. They then put a thin needle through the skin into the hip bone. This might be uncomfortable for some, but this only lasts a short time.

Your doctor or nurse draws a small amount of liquid bone marrow into the needle, using a syringe. You might feel a pulling sensation when they start drawing the bone marrow cells out. 

They take this needle out and put the second one in if you are having a trephine biopsy. The aim is to get a small amount of marrow out in one piece.

The whole test takes around 30 minutes.

Take a look at this 2 minute video about having a bone marrow test. 

Transcript

What to expect when you have a bone marrow test

Your bone marrow is the spongy substance in the centre of the bones where the blood cells are made.

You may have a bone marrow test if you have a cancer which affects the bone marrow such as leukaemia, lymphoma or myeloma. if your doctor thinks your bone marrow may contain cancer cells that have spread from another type of cancer or you have a non-cancerous condition.

There are two types of tests. A bone marrow aspiration which takes some bone marrow cells and a bone marrow biopsy which takes samples of the bone marrow and gives more information about its structure.

Usually your doctor takes the sample from the back of your hip bone but you can have a bone marrow aspiration from your breast bone.

You have the test lying on a couch. You may have a sedative beforehand to make you sleepy. The doctor then injects some local anaesthetic to numb the area.

For a bone marrow aspiration they put a needle through your skin and into your bone. Then using a syringe they draw out some liquid bone marrow. You may feel a pulling sensation as they do this.

For a biopsy your doctor uses a slightly bigger needle to take the sample of bone marrow. They turn and push this needle to get the sample. This can be painful as the needle goes in but it doesn’t last for long.

You usually go home about half an hour after the test. If you had sedation you need to wait until you are fully awake. This can take a few hours.

Afterwards your hip will ache for a few days. Taking painkillers helps.

You may also have some bruising. Rarely you may have some slight bleeding from the site. Press on it if you do and if it doesn’t stop contact the hospital.

There is a small risk of infection. Tell your doctor if you have a temperature or the biopsy area becomes red and sore.

You may have some tingling in your leg which will also wear off with time.

Sedation

Some people prefer to have some type of sedative before the test so that they are a bit drowsy. Some hospitals may use gas and air (Entonox) to help relax you instead of sedation.

Children and teenagers often have sedation for this type of test.

We have a children’s cancer section where you can find out about this test if your child has acute lymphoblastic leukaemia (ALL).  

After your bone marrow test

You usually go home the same day if you’re feeling well enough.

You have a dressing over the site, which you should keep on for 24 hours. If you notice any bleeding apply pressure to the area. If it doesn’t stop, contact the hospital.

After the test, your hip might ache for a couple of days. You may need some mild painkillers such as paracetamol to take at home.

As you’re having sedation you’ll need someone with you so they can take you home and stay with you overnight. Also for 24 hours after you shouldn’t drive, drink alcohol, operate heavy machinery or sign any legally binding documents.

Possible risks from having a bone marrow test

A bone marrow test is very safe and any risks are small. 

During the procedure there is a very small risk of damage to nearby structures, but this is very rare.  

Bleeding

It’s not unusual to have a small amount of bleeding from the area where the needle went in. If you notice any heavy bleeding, apply pressure to the area. If it doesn’t stop, contact the hospital.

Bruising

Sometimes blood leaks out of the vein and collects under your skin. This can look like a small dark swelling under the skin (haematoma). Pressing hard once the needle is removed can help.

Infection

There is a small risk of getting an infection in the wound. Tell your doctor if you have a temperature or if the area becomes red and sore. 

Pain

Some people feel uncomfortable and have pain after the local anaesthetic has worn off. Your nurse will tell you what painkillers to take. If you have severe pain or it’s getting worse then you should contact the hospital.

Tingling in your leg

You may have some tingling in your leg which wears off with time.

Getting your results

Your bone marrow test is looked at in the laboratory. The time it takes to receive results depends on the which tests are being done on the bone marrow samples.

Basic results can be available as soon as 24 to 48 hours. Whereas if for example you’re having genetic tests on your bone marrow samples, these results can take a couple of weeks. You won’t get any results at the time of having a bone marrow taken. It’s best to ask your doctor or nurse how long it will take to get them.

Waiting for test results can make you anxious. You might have the contact details of a specialist nurse. You can contact them for information and support if you need to. It may also help to talk to a close friend or relative about how you feel. 

For support and information, you can call the Cancer Research UK nurses on freephone 0808 800 4040. The lines are open from 9am to 5pm, Monday to Friday.

More information

We have more information on tests, treatment and support if you have been diagnosed with cancer.

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    AV Hoffbrand and D P Steensma
    Wiley Blackwell, 2019

  • The Royal Marsden Manuel of Clinical Nursing Procedures, Professional Edition (10th Edition)
    S Lister, J Hofland and H Grafton
    Wiley Blackwell, June 2020

  • Tissue pathways for lymph node, spleen and bone marrow trephine biopsy specimens
    The Royal College of Pathologists, November 2017

  • ICSH guidelines for the standardization of bone marrow immunohistochemistry
    E E Torlakovic and others
    International Journal Of Laboratory Hematology, 2015. Volume 37, Pages 431 to 449

  • European recommendations and quality assurance for cytogenomic analysis of haematological neoplasms
    KA Rock and others
    Leukaemia, 2019. Volume 33, Issue 19, Pages 1851 to 1867

  • The information on this page is based on literature searches and specialist checking. We used many references and there are too many to list here. Please contact [email protected] with details of the particular issue you are interested in if you need additional references for this information. 

Last reviewed: 

26 Jul 2022

Next review due: 

26 Jul 2025