Papillary cystadenoma of the epididymis: a report of two cases with an immunohistochemical study

Abstract

Two cases of papillary cystadenoma of the epididymis are described. An immunohistochemical study demonstrates that these lesions have a similar pattern of immunostaining to the normal efferent epididymal ductules. This finding supports the theory that epididymal papillary cystadenomas originate from these ductules and are true epithelial tumours of the epididymis.