micrometastasis
(mī′krō-mə-tăs′tə-sĭs)- The spread of cancer cells from the primary site with the secondary tumors too small to be clinically detected.
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.