PMID: 8971560Dec 1, 1996Paper

Mammary mucinous lesions: congeners, prevalence and important pathological associations

Histopathology
C N Chinyama, J D Davies

Abstract

A retrospective histopathological study was undertaken to determine the prevalence of mucin filled ducts and their associated mucinous proliferation in 962 breast cancers and 335 benign lesions. A total of 38 (3%) cases with mucin filled ducts was identified and 27 (2%) of these showed mucin extravasation into the adjacent stroma, changes characteristic of mucocoele-like lesions. This constitutes the largest series reported to date. Of the mucocoele-like lesions 12 were prototypic screen-detected cases: 11 of which were mammographically detected on account of suspicious microcalcification and eight cases (67%) exhibited mucinous atypical ductal hyperplasia without overt malignancy. A further 12 mucocoele-like lesions were incidental findings in screen-detected (11) and symptomatic (one) cancers, the majority of which were invasive ductal carcinomas of no special type. In six of these cases (50%), mucinous atypical ductal hyperplasia or ductal carcinoma in situ was present. Thirty mucinous carcinomas constituted 3% of all cancers and three cases had associated mucocoele-like lesions. Mucinous atypical ductal hyperplasia or ductal carcinoma in situ was also associated with 11 cases of mucinous carcinoma. In six mucinous carcinoma...Continue Reading

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