Abnormalities of
the testicle are quite common. They include water on the testicle
(hydrocele), lumps of the epididymis (epididymal cyst), swellings
caused by infection (epididymitis and orchitis). All of these are
benign. Remember however that amateur diagnosis is a relatively dangerous
sport and if you are in any doubt get checked by a doctor, don't
take any risks.
Click on the play
button on the right. The animation will demonstrate how the testes
and its coverings can swell for reasons other than cancer.