Final answer:
A condition in which there is an excessive accumulation of fluid within the tissue surrounding the testicle, which causes a scrotal mass is known as hydrocele.
Step-by-step explanation:
A condition in which there is an excessive accumulation of fluid within the tissue surrounding the testicle, which causes a scrotal mass is known as hydrocele. It is a common condition that can occur at any age, but is most commonly seen in newborns and older men. A hydrocele usually resolves on its own within a few months in newborns, but may require intervention in older individuals.