Pseudoneoplastic Glandular Lesions of the Uterine Cervix: A Selective Review

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Abstract

Pseudoneoplastic glandular lesions of the cervix continue to be diagnostically challenging for the surgical pathologist. This review covers a select number of these lesions that may be misinterpreted as premalignant or malignant, with an emphasis on those about which Dr Scully has advanced our knowledge. The topics covered include microglandular hyperplasia, mesonephric hyperplasia, diffuse laminar endocervical glandular hyperplasia, lobular endocervical glandular hyperplasia, and endocervical adenomyoma. The first listed entity has a greater diversity of morphology than the name might imply including, but not limited to solid growth and prominent hyaline stroma. The second entity may be remarkably diffuse within the cervical wall and reasonably result in consideration of diagnoses such as minimal deviation adenocarcinoma (adenoma malignum), but has nonmucinous epithelium and bland cytology. The third entity, one of the least common of those considered, represents a peculiar form of reactive hyperplasia of the endocervical epithelium. The fourth entity is the one about which knowledge is still fast advancing. In pure form with no atypia it is almost certainly a clinically benign process, but a subset of cases show cytologic atypia and an occasional association with adenocarcinoma is seen. Finally, adenomyomas of the uterus in general have received much attention in recent years, mostly in the corpus, but the less common endocervical variant may be particularly problematic because mucinous epithelium in abundant myogenic stroma may be potentially confused with an infiltrating differentiated mucinous adenocarcinoma. Although immunohistochemistry may play a role on occasion in evaluating benign endocervical glandular proliferations the mainstay of their interpretation remains conventional morphologic analysis of routinely stained slides.

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