[Torsion of a seminoma in an intrascrotal testis. A case report].

We report a case of torsion of an intrascrotal testicular tumor. The patient was a 54-year-old man with a chief complaint of swelling and pain in the left scrotum. A testicular scan using 99mtechnetium RBC demonstrated a large cold area of isotope uptake showing loss of blood flow in his left scrotal content. Pre operative diagnosis was acute testicular torsion. A torsed testicle was delivered through an inguinal incision. The testicle appeared to be twisted 720 degrees clock wise. It was swollen and bluish in color. The blood flow did not recover after the relief of twisting. Radical orchiectomy was performed. The histology demonstrated a seminoma. He was free of disease 4 years after surgery. A torsion of testicular tumor in an undescended testis has been reported sporadically. However, the torsion of the intrascrotal testicular tumor is very rare. There have been 5 reported cases in the world literature and this case seems to be the first one in Japan.