atypical transformation zone
Also found in: Acronyms.
atypical transformation zoneGynecology 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.