Recent studies have described premalignant changes in the endocervical epithelium, but morphological criteria for the diagnosis of cervical glandular atypia of lesser severity than adenocarcinoma in situ have not been established. Adenocarcinoma in situ is often associated with cervical intraepithelial neoplasia (CIN). The endocervical mucosa in 105 cases of CIN grade III was evaluated and compared with that of 100 controls. Sixteen cases of cervical glandular atypia and one case of adenocarcinoma in situ were identified, and it was possible to discriminate between these and a range of benign glandular lesions. Interestingly, the control series included two patients with cervical glandular atypia, one of whom on review had had a cone biopsy for CIN. The progression of cervical glandular atypia through adenocarcinoma in situ to invasive adenocarcinoma is known, but the natural history of cervical glandular atypia is as yet uncertain.
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