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microinvasion in Medicine

microinvasion

(mī′krō-ĭn-vāzhən)
n.
  1. Invasion of in situ carcinoma into tissue that is immediately adjacent, being the earliest stage of malignant neoplastic invasion.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.