Hypospadias(redirected from urogenital sinus anomaly)
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a congenital underdevelopment of the urethra consisting in the absence of its lower wall, so that the urethra does not open, as usual, in the glans penis, but instead on the underside of the penis, the scrotum, or the perineum.
Hypospadias is the most commonly found anomaly in the development of the organs of the male urogenital system. It is manifested by impairment of urination and, in adults, of sexual functions. In strongly pronounced hypospadias sexual activity is made difficult and sometimes impossible because of deformation of the penis. In extreme cases of scrotal and perineal hypospadias mistakes in determining sex are common. No treatment is required in minor cases of hypospadias; in all other cases, surgery is necessary.