atypical transformation zone


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atypical transformation zone

Gynecology A transformation zone–the interface between the cervical and endocervical mucosa, which is characterized by various patterns–eg, leukoplakia, acetowhite epithelium and abnormal vascular patterns, changed epithelial thickness, nuclear density, vascular proliferation; 90% of cervical neoplasias–CIN and invasive CA arise in the transformation zone. See Transformation zone.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.