Evaluation of indolent epididymal mass - adenomatoid tumor of the epididymis

Abstract

Adenomatoid tumor of the epididymis is a rare benign neoplasm of mesothelial origin, mostly localized in the epididymis. It is usually presented as an indolent, painless scrotal enlargement. Immunohistochemically it is characterized by strong positivity for calretinin and epithelial markers, while tumor marker values are within the reference ranges. In this paper, two cases of 28- and 37-year-old men with adenomatoid tumors of the epididymis are described. In both, the tumor was presented as an indolent, slowly growing palpable mass in the epididymis. Tumor markers were in the normal range, digital examination found painless scrotal enlargement, while ultrasound showed a nonhomogeneous tumor. Immunohistochemically, they were characterized by strong positivity for calretinin and epithelial markers. If a localized epididymal mass is found, it is necessary to conduct an adequate diagnostic examination to differentiate inflammatory process from the neoplasm. An excision of the lesion is the most recommended option that also preserves testicular function and fertility. Histological and immunohistochemical evaluation are mandatory for a definitive diagnosis.

Keywords

• adenomatoid tumor
• epididymis
• immunohistochemical evaluation
• preservation of testicular function