The ancillary techniques applied on cytology of female genital tract glandular lesions have been developed almost exclusively in those of the endocervix and for differential diagnoses between the endocervix and endometrium. Consequently we focus here on endocervical lesions.Endocervical glandular lesions are rare, benign cases, which are much more frequent than malignant ones. Benign lesions maybe classified into several groups: (1) metaplasia, including tubal, endometrial or tubulo-endometrial cases; (2) hyperplasia, such as 'tunnel clusters'; (3) endocervical lobular hyperplasia, diffuse or microglandular; (4) decidual change, such as the Arias Stella Reaction; (5) endometriosis, and (6) embryological remnants, such as mesonephric remnants, including hyperplastic and neoplastic changes, as well as prostatic remnants.
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