Hydrocele, or as the people say - dropsy of the testicle in children - is a disease in which there is an excessive accumulation of fluid in the scrotum, between the membranes of the testicle.
Hydronephrosis is a disease characterized by persistent and progressive expansion of the renal pyelocaliceal system caused by obstruction of the ureteral patency due to narrowing inside the lumen or its external compression.
Penile frenum plasty is a method of surgical correction of a short frenum, when it limits the range of motion between the foreskin and the glans penis.