A case report of a proximal corporal cavernosa injury presenting with butterfly perineal ecchymosis.

This is a case of a proximal corpus cavernosa fracture presenting with scrotal edema and butterfly perineal ecchymosis sparing the penile shaft. Preoperative MRI obviated the need for circumferential incision and degloving of the penis and guided immediate incision over the area of corporal injury. The presentation, diagnostic work-up, and surgical treatment are discussed.