Philadelphia chromosome
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- (FIH-luh-DEL-fee-uh KROH-muh-some) An abnormality of chromosome 22 in which part of chromosome 9 is transferred to it. Bone marrow cells that contain the Philadelphia chromosome are often found in chronic myelogenous leukemia.
National Cancer Institute - Cite This Source - This Definition - BCR-ABL fusion gene, c-ABL, Translocation