If you had to boil it down, what is hydrocele?

Fluid: A hydrocele is a collection of fluid in the scrotum. It's not malignant, and usually we just watch them.

Fluid: A hydrocele is entrapment of fluid within the tunics albuginea, the sac surrounding the testicle. In short, a fluid filled sac around one or both testicles.

It's...: Hydrocele is a resultant swelling of scrotum from fluid accumulation inside the natural space between testis and scrotal wall due to imbalance of fluid secretion and absorption, secondary to no identifiable cause, or infection, trauma, tumor, torsion, etc.