allogeneic stem cell transplantation(A-loh-jeh-NAY-ik stem sel tranz-plan-TAY-shun)
A procedure in which a person receives blood-forming stem cells (cells from which all blood cells develop) from a genetically similar, but not identical, donor. This is often a sister or brother, but could be an unrelated donor.
Stem cell transplant (Step 1). Blood is taken from a vein in the arm of the donor. The patient or another person may be the donor. The blood flows through a machine that removes the stem cells. Then the blood is returned to the donor through a vein in the other arm.
Stem cell transplant (Step 2). The patient receives chemotherapy to kill blood-forming cells. The patient may receive radiation therapy (not shown).
Stem cell transplant (Step 3). The patient receives stem cells through a catheter placed into a blood vessel in the chest.2003-01-26