Cysts and Tumors of Epididymis in Male Animals

Cysts and tumors of the epididymis are uncommon swellings that may be congenital or acquired. Cysts are usually fluid-filled and benign, while tumors can be either benign or malignant.

Paramesonephric Cysts or Uterus Masculinus

Paramesonephric cysts or uterus masculinus seen commonly in 24 to 44 percent of bulls on the dorsal surface of the urogenital fold between the ampullae and ductus deferens or rarely in or near the epididymis.

Tumors

Primary tumors of the epididymis are rare in all animals. Testicular tumors in dogs or other animals may invade the epididymis or spread through the epididymis to the vas deferens and cord.

Occasionally metastatic tumors may develop in the epididymis.