(MayoClinic.com) If a family member is sick and in need of a bone marrow transplant, you might be interested in helping your loved one. One option may be bone marrow donation.
Bone marrow is a spongy material found inside your bones. The bone marrow contains immature stem cells, which can develop into three different types of blood cells:
It is the stem cells in your bone marrow that can benefit the transplant recipient.
In the past, donation of stem cells from bone marrow involved minor surgery to draw marrow from your hipbones. Stems cells were then collected from the donated marrow. Today the most common way of collecting the stem cells is by filtering them directly from your blood. Doctors call this procedure peripheral blood stem cell donation, but many people still refer to it as bone marrow donation, even though bone marrow isn't directly involved.
You may be able to donate your bone marrow stem cells if you're in good health and doctors determine that you're a match for the person who needs a bone marrow stem cell transplant.
Doctors compare the characteristics of the stem cells in your bone marrow to those of the potential recipient to see if the proteins in your cells are similar. A close match increases the chances that the recipient's body will accept your bone marrow cells. Doctors can test your stem cells by examining a small sample of your blood. Your full brothers and sisters are the best match for your bone marrow.
If your bone marrow appears to be a suitable match for the person waiting for a transplant, you'll undergo an examination to ensure that your bone marrow can be transplanted. The doctor will want to rule out any genetic or infectious diseases you might have, since these can be passed on to the bone marrow recipient. The doctor also asks questions about your general health and your family health history to determine whether bone marrow donation will be safe for you.How do you prepare for bone marrow stem cell donation?
Before you can donate your bone marrow, doctors give you injections of a medication to draw the blood stem cells out from your bone marrow and into your bloodstream. That way they can be easily filtered from your blood.
The medication, filgrastim (Neupogen), is typically given as an injection once a day for four or five days before your bone marrow stem cell donation. Doctors will monitor your blood counts to see how your body is reacting to the filgrastim. They'll also be looking to see if you have an optimal number of stem cells circulating in your blood.How is bone marrow stem cell donation done?
During bone marrow stem cell donation, a machine collects your blood stem cells through a process called apheresis. Blood is drawn from your arm and runs through a machine that filters out the blood stem cells. Then your blood is returned to your body through your opposite arm.
Apheresis takes four to six hours. You'll typically undergo two to four apheresis sessions, depending on how many blood stem cells are needed.What can you expect during bone marrow stem cell donation?
Removing blood stem cells from your blood during apheresis doesn't hurt. However, the medication you're given to coax the blood stem cells out of your marrow may cause bone pain — similar to the aches you might feel if you have the flu. On rare occasions the pain may be so severe that you might discontinue the injections. The bone pain goes away once you stop receiving the injections. Other common side effects are fatigue, headache, muscle pain, and tingling around the lips, mouth and fingers.Risks of bone marrow stem cell donation
Bone marrow stem cell donation is generally safe. Side effects associated with bone marrow stem cell donation include:
These side effects go away once you complete the bone marrow stem cell donation. If you have small veins in your arms or you have veins with thin walls, your doctor may need to insert a catheter into larger veins in your body — including those in your groin and your neck. This occurs most commonly in small women. Placing a catheter in your larger veins rarely causes side effects, but complications can include:
Some people in need of a bone marrow stem cell transplant don't have any family members with compatible bone marrow. These people often turn to the National Marrow Donor Program to find a compatible donor. The donor program keeps a database of volunteers who are willing to donate their bone marrow to strangers.
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