# Non-papillary serous cystadenoma of the epididymis associated with infected hydrocele of the testis: A case report

## TL;DR

A 50-year-old man had a rare case of non-papillary serous cystadenoma in the epididymis along with an infected hydrocele, identified through surgery and pathology.

## Contribution

This case report documents a rare combination of non-papillary serous cystadenoma and infected hydrocele in the epididymis.

## Key findings

- The patient had a multilocular cyst attached to the testis confirmed by preoperative examination.
- Pathological analysis identified two cysts: infected hydrocele and serous cystadenoma of the epididymis.
- The epithelial cyst showed positive immunohistochemical staining for estrogen and progesterone receptors.

## Abstract

A 50-year-old Japanese man with enlargement of the right scrotum was presented to our hospital. Preoperative examination confirmed a multilocular cyst with septa attached to the testis. Radical orchiectomy was performed. Pathological examination revealed closely-located two cysts; larger one was infected hydrocele testis, and smaller one was epithelial cyst, which were immunohistochemically positive widely for estrogen receptor (ER) and partly for progesterone receptor (PR). We concluded that the smaller cyst was serous cystadenoma of the epididymis.