epispadia MPheno.ontology hyperspadia MP:0003598 hyperspadias epispadias congenital absence of the upper wall of the urethra, occurring in both sexes, but more often in the male, with the urethral opening somewhere on the dorsum of the penis at any point below the internal sphincter; in females, the malformed urethral opening is often located aberrantly abnormal external urethral orifice morphology