[Low-grade papillary adenocarcinoma of the endolymphatic sac. Report of three cases with immunohistochemical study].

Abstract

Glandular tumors involving the mastoid and the middle ear are rare, and distinguishing between adenoma and adenocarcinoma remains difficult. Among these latter lesions, two distinct patterns are accepted. One of them, the papillary form takes a more aggressive course with wider regional spread and must be separated from the other type, the middle ear… (More)

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