Endocervical glandular lesions: controversial aspects and ancillary techniques

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Abstract
The incidence of malignant and premalignant endocervical glandular lesions is increasing. This review covers controversial and difficult aspects regarding the categorisation and diagnosis of these lesions. The terminology of premalignant endocervical glandular lesions is discussed because of the differences between the UK terminology and the widely used World Health Organisation classification. The morphology and histological subtypes of premalignant endocervical glandular lesions are described. Early invasive adenocarcinoma and difficulties in the diagnosis and recognition of this entity are covered, as is the measurement of early invasion within cervical adenocarcinoma. Several benign endocervical glandular lesions can mimic malignant and premalignant endocervical glandular lesions, and the distinction of these benign mimics from premalignant and malignant lesions using ancillary immunohistochemical studies is also covered. Antibodies used to distinguish between endometrial and endocervical adenocarcinoma, in the diagnosis of cervical minimal deviation adenocarcinoma of mucinous type (adenoma malignum), and in the diagnosis of cervical mesonephric lesions are also reviewed.