NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,470 terms related to cancer and medicine.

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stem cell transplant
(stem sel TRANZ-plant)
A procedure in which a patient receives healthy stem cells (blood-forming cells) to replace their own stem cells that have been destroyed by disease or by treatment with radiation or high doses of chemotherapy. The healthy stem cells may come from the blood or bone marrow of the patient or from an unrelated donor. A stem cell transplant may be autologous (using a patient’s own stem cells that were collected and saved before treatment), allogeneic (using stem cells from a related or unrelated donor), syngeneic (using stem cells donated by an identical twin), or cord blood (using umbilical cord blood donated after a baby is born).