Surgical treatment of impotence caused by megalourethra.

A twenty-three-year-old impotence patient is presented who had never achieved penile erection and who suffered megalourethra and megaloureter. Through a penothermocurve the cause of impotence was diagnosed as megalourethra and extensively thickened penile skin. Plastic surgery was performed, and sufficient resection of the enlarged urethral wall and penile skin resulted in successful penile erection and satisfactory intercourse. The usefulness of the penothermocurve was demonstrated as a means for the differential diagnosis of impotence.