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Bone marrow is the spongy tissue inside some of your bones, such as your hip and thigh bones. It contains immature cells, called stem cells. The stem cells can develop into the red blood cells that carry oxygen through your body, the white blood cells that fight infections, and the platelets that help with blood clotting.

If you have a bone marrow disease, there are problems with the stem cells or how they develop. Leukemia is a cancer in which the bone marrow produces abnormal white blood cells. With aplastic anemia, the bone marrow doesn’t make red blood cells. Other diseases, such as lymphoma, can spread into the bone marrow and affect the production of blood cells. Other causes of bone marrow disorders include your genetic makeup and environmental factors.

Symptoms of bone marrow diseases vary. Treatments depend on the disorder and how severe it is. They might involve medicines, blood transfusions or a bone marrow transplant.

Bone Marrow Disease Signs and Symptoms

Pain

Bone pain, an aching of the joints and headaches are all symptoms of bone marrow disease. These types of complaints occur when a person with a bone marrow disorder has a very low red blood cell count.

Anemia

When red blood cell counts become dangerously low, a person can develop anemia due to the drop in oxygen that is carried throughout the body. Excessive fatigue and weakness are symptoms of anemia that may occur in patients with bone marrow disease. Additional signs include becoming very pale and “washed out” looking, and bruising very easily. People who have anemia due to bone marrow disorders may bleed easily and more profusely than others.

Swelling

Bone marrow disorders can lead to swelling of the internal organs in some people. The spleen, kidneys or liver may become enlarged in response to the disease that is damaging the blood cells. According to the Aplastic Anemia and MDS International Foundation, a person with bone marrow disease may experience frequent infection and, as a result, swollen glands. Males with blood disorders that lead to bone marrow abnormalities may experience a swelling of the testicles.

Chromosomal Changes

Extensive blood and gene testing is performed on people who have bone marrow disease. Some of the signs of illness from a scientific perspective include chromosomal changes and gene changes in response to the disease. People who have some kinds of leukemia may show parts of chromosomes that move to other chromosomes. Blood tests may also show large amounts of replicated white blood cells that have populated the patient’s blood in an attempt to fight the infection.

What Are Bone Marrow Tests?

Bone marrow tests check whether your bone marrow is healthy. These tests also show whether your bone marrow is making normal amounts of blood cells.

Bone marrow is a sponge-like tissue inside the bones. It contains stem cells that develop into the three types of blood cells that the body needs:

  • Red blood cells carry oxygen throughout your body.
  • White blood cells fight infections.
  • Platelets (PLATE-lets) stop bleeding.

Another type of stem cell, called an embryonic (em-bre-ON-ik) stem cell, can develop into any type of cell in the body. These cells aren’t found in bone marrow.

Overview

Doctors use bone marrow tests to diagnose blood and bone marrow diseases and conditions, including:

  • Conditions in which a person produces too few or too many of certain types of blood cells
  • Problems with the structure of red blood cells
  • Bone marrow disorders, such as myelofibrosis (MI-eh-lo-fi-BRO-sis)
  • Some cancers, such as leukemia (lu-KE-me-ah)

Bone marrow tests also help doctors figure out how severe cancer is and how much it has spread in the body. The tests also are used to diagnose fevers and infections.

The two bone marrow tests are aspiration (as-pih-RA-shun) and biopsy.

Bone marrow aspiration usually is done first. For this test, your doctor removes a small sample of fluid bone marrow through a needle. He or she may have some idea of what the problem is, and the sample gives him or her useful information about the cells in the marrow.

A bone marrow biopsy is the followup test. It’s done to provide more information about your cells. Also, a biopsy is done if your doctor wants to examine the bone marrow structure itself. For this test, your doctor uses a needle to remove a sample of bone marrow tissue.

Bone marrow transplant

A bone marrow transplant is a procedure to replace damaged or destroyed bone marrow with healthy bone marrow stem cells.

Bone marrow is the soft, fatty tissue inside your bones. Stem cells are immature cells in the bone marrow that give rise to all of your blood cells.

Description

There are three kinds of bone marrow transplants:

  • Autologous bone marrow transplant: The term auto means self. Stem cells are removed from you before you receive high-dose chemotherapy or radiation treatment. The stem cells are stored in a freezer (cryopreservation). After high-dose chemotherapy or radiation treatments, your stems cells are put back in your body to make (regenerate) normal blood cells. This is called a rescue transplant.
  • Allogeneic bone marrow transplant: The term allo means other. Stem cells are removed from another person, called a donor. Most times, the donor’s genes must at least partly match your genes. Special blood tests are done to see if a donor is a good match for you. A brother or sister is most likely to be a good match. Sometimes parents, children, and other relatives are good matches. Donors who are not related to you may be found through national bone marrow registries.
  • Umbilical cord blood transplant: This is a type of allogeneic transplant. Stem cells are removed from a newborn baby’s umbilical cord right after birth. The stem cells are frozen and stored until they are needed for a transplant. Umbilical cord blood cells are very immature so there is less of a need for matching. But blood counts take longer to recover.

Before the transplant, chemotherapy, radiation, or both may be given. This may be done in two ways:

  • Ablative (myeloablative) treatment: High-dose chemotherapy, radiation, or both are given to kill any cancer cells. This also kills all healthy bone marrow that remains, and allows new stem cells to grow in the bone marrow.
  • Reduced intensity treatment, also called a mini transplant: Patients receive lower doses of chemotherapy and radiation before a transplant. This allows older patients, and those with other health problems to have a transplant.

A stem cell transplant is done after chemotherapy and radiation is complete. The stem cells are delivered into your bloodstream usually through a tube called a central venous catheter. The process is similar to getting a blood transfusion. The stem cells travel through the blood into the bone marrow. Most times, no surgery is needed.

Donor stem cells can be collected in two ways:

  • Bone marrow harvest. This minor surgery is done under general anesthesia. This means the donor will be asleep and pain-free during the procedure. The bone marrow is removed from the back of both hip bones. The amount of marrow removed depends on the weight of the person who is receiving it.
  • Leukapheresis. First, the donor is given 5 days of shots to help stem cells move from the bone marrow into the blood. During leukapheresis, blood is removed from the donor through an IV line in a vein. The part of white blood cells that contains stem cells is then separated in a machine and removed to be later given to the recipient. The red blood cells are returned to the donor.

Why the Procedure is Performed

A bone marrow transplant replaces bone marrow that either is not working properly or has been destroyed (ablated) by chemotherapy or radiation.

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

  • Certain cancers, such as leukemia, lymphoma, and multiple myeloma
  • A disease that affects the production of bone marrow cells, such as aplastic anemia, congenitalneutropenia, severe immunodeficiency syndromes, sickle cell anemia, thalassemia
  • Had chemotherapy that destroyed your bone marrow

Risks

A bone marrow transplant may cause the following symptoms:

  • Chest pain
  • Chills
  • Drop in blood pressure
  • Fever
  • Flushing
  • Funny taste in the mouth
  • Headache
  • Hives
  • Nausea
  • Pain
  • Shortness of breath

Possible complications of a bone marrow transplant depend on many things, including:

  • The disease you are being treated for
  • Whether you had chemotherapy or radiation before the bone marrow transplant and the dosages of such treatments
  • Your age
  • Your overall health
  • How good of a match your donor was
  • The type of bone marrow transplant you received (autologous, allogeneic, or umbilical cord blood)

Complications can include:

  • Anemia
  • Bleeding in the lungs, intestines, brain, and other areas of the body
  • Cataracts
  • Clotting in the small veins of the liver
  • Damage to the kidneys, liver, lungs, and heart
  • Delayed growth in children who receive a bone marrow transplant
  • Early menopause
  • Graft failure, which means that the new cells do not settle into the body and start producing stem cells
  • Graft-versus-host disease, a condition in which the donor cells attack your own body
  • Infections, which can be very serious
  • Inflammation and sorenes in the mouth, throat, esophagus, and stomach, called mucositis
  • Pain
  • Stomach problems, including diarrhea, nausea, and vomiting

Before the Procedure

Your health care provider will ask about your medical history and do a physical exam. You will have many tests before treatment begins.

Before transplant, you will have one or two tubes, called catheters, inserted into a blood vessel in your neck or arms. This tube allows you to receive treatments, fluids, and sometimes nutrition.

Your doctor or nurse will likely discuss the emotional stress of having a bone marrow transplant. You may want to meet with a mental health counselor. It is important to talk to your family and children to help them understand what to expect.

You will need to make plans to help you prepare for the procedure and handle tasks after your transplant:

  • Complete an advance care directive
  • Arrange medical leave from work
  • Take care of bank or financial statements
  • Arrange care of pets
  • Arrange for someone to help with household chores
  • Confirm health insurance coverage
  • Pay bills
  • Arrange for care of your children
  • Find housing for yourself or your family near the hospital, if needed

After the Procedure

A bone marrow transplant is usually done in a hospital or medical center that specializes in such treatment. Most of the time, you will stay in a special bone marrow transplant unit in the center. This is to limit your chance of getting an infection.

Depending on the treatment and where it is done, all or part of an autologous or allogeneic transplant may be done as an outpatient. This means you do not have to stay in the hospital.

How long you stay in the hospital depends on how much chemotherapy or radiation you received, the type of transplant, and your medical center’s procedures. While you are in the hospital, you will be isolated because of the increased risk of infection. The health care team will closely monitor your blood count and vital signs.

While you are in the hospital you may:

  • Receive medications to prevent or treat infections, including antibiotics, antifungals, and antiviral drugs
  • Need many blood transfusions
  • Be fed through a vein (IV) until you can eat by mouth and stomach side effects and mouth sores have gone away
  • Be given medications to prevent graft-versus-host disease

Outlook (Prognosis)

How well you do after transplant depends on:

  • The type of bone marrow transplant
  • How well the donor’s cells match yours
  • What type of cancer or illness you have
  • Your age and overall health
  • The type and dosage of chemotherapy or radiation therapy you had before your transplant
  • Any complications
  • Your genes

A bone marrow transplant may completely or partially cure your illness. If the transplant is a success, you can go back to most of your normal activities as soon as you feel well enough. Usually it takes up to 1 year to recover fully.

Complications or failure of the bone marrow transplant can lead to death.