Question Title: Lump Right side

Lumps outside the testicle can arise from a variety of structures. There are two main structures in the scrotum. These are the testicle and the epididymis. Cancer of the epididymis is extremely uncommon. However, lumps and bumps associated with it are quite common. Spermatoceles are collections of sperm that arise from the epididymis and become walled off bumps. They are completely benign. Hydroceles are collections of fluid. These are also completely benign. They can occur for a variety of reasons including surgery, trauma and infection. Also, you mentioned that you had a vasectomy. Scar tissue formation called granulomas are quite common in this setting.
A mass of the testicle is much more reason for concern. Testicular cancer is now one of the most treatable cancers when detected early. A mass is the most common presenting complaint. The easiest test to determine the cause of your lump is a scrotal ultrasound which is both quick and painless.
This information is provided for general medical education purposes only. Please consult your physician for diagnostic and treatment options pertaining to your specific medical condition. More individualized care is available at the Henry Ford Hospital and its satellites (1 800 653 6568).

HFHS M.D.-KR
*keyword: vasectomy, scrotal masses