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malignant melanoma in situ in Medicine

malignant melanoma in situ

(ĭn sītōō, sē-)
n.
  1. A melanoma limited to the epidermis and composed of atypical melanocytes that may be round with abundant cytoplasm.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.