atypical transformation zone


Also found in: Acronyms.

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.
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