Definition A hydrocele is a sac filled with fluid that forms around a testicle. This occurs when the fluid collects in the thin sheath surrounding a testicle. Hydroceles are most common in babies and usually disappears without treatment by age 1. Older boys and adult men can develop a hydrocele …

Definition Hydrocephalus is a usually congenital condition in which an abnormal accumulation of cerebrospinal fluid in the cerebral ventricles causes enlargement of the skull and compression of an injury to brain tissue. If it becomes progressive, a shunt is surgically placed to reduce pressure by conducting fluid away from the …