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philadelphia chromosome in Medicine

Philadelphia chromosome

(fĭl′ə-dĕlfē-ə)
n.
  1. An abnormal minute chromosome found in white blood cells in many cases of chronic myelocytic leukemia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.