Multiple bilateral nonpapillary serous cystadenoma of the epididymis.

Epithelial cystic neoplasms of the epididymis are rare, the commonest is papillary serous cystadenoma. Recently, few cases of epididymal nonpapillary serous cystadenoma (NPSC) were reported. They have unique histomorphologic and immunohistochemical features that help distinguish them from other cystic lesions of the paratestis. All the reported cases presented as a single unilateral epididymal cyst. We report a unique example and, to our knowledge, the first case of multiple bilateral NPSC of the epididymis. Moreover, it showed a pigmented epithelium.