When this injury happens, it can cause swelling between the anus and the scrotum. When you have a lump between anus and scrotum, you might not feel comfortable talking to your friends. Discussion Median raphe cysts are rare and, despite the involvement of the external genitalia, their description is primarily limited to case reports, small series, and paediatric and dermatology reference texts. Prostate Cancer. Other rarer differential diagnosis would include - a Cowper's duct cyst:
The glands in the armpit can swell to more than a few centimetres in response to infection or illness. Test your knowledge.