[A case of self-mutilation of testis].

A 22-year old man was admitted to the emergency room of our hospital with bleeding from scrotal wound. He had resected his own scrotum and both testes by himself with a small knife, since he thought that his testes had developed necrosis. He had thrown his scrotal skin and both testes away in a lavatory. We closed the wide wound surface and the surrounding skin after ligation of the spermatic cord. The post-operative course was uneventful. The patient was referred to the psychiatric department of our hospital and received supportive psychotherapy under diagnosis of schizophrenia. This is the 23rd case to be reported as self-injury of the external genitalia and the 7th case limited to testis in the Japanese literature.