Epispadias

Definition:

A rare congenital defect that affects males in which the urethra opens on the top (dorsal) surface of the penis.

Causes, incidence, and risk factors:

Epispadias occurs in one of three forms. The urethra may open on top of the head of the penis, the entire urethra may be open the full length of the penis, or the entire urethra may be open with the bladder opening on the abdominal wall. A similar condition can exist in females, but this is rare.