停留精巣手術で見落とされていた腹腔内精巣から発生した腹腔内精巣腫瘍の1例

Abstract

Here, we report an adult case of intra-abdominal testicular cancer after surgical treatment of an undescended testis in infancy. A 36-year-old male patient was accidentally diagnosed with a tumor in the pelvic cavity by ultrasonographic examination. He had hematuria and the human chorionic gonadotropin beta subunit level was slightly elevated. T2-weighedmagnetic resonance imaging revealed a well-defined and highly intense mass. Since these findings suggested intra-abdominal testicular cancer, laparoscopic surgery was performed to remove the mass. Laparoscopy revealed an intra-abdominal tumor accompanied by a looping vas deferens entering the left inguinal canal. The distal part of the looping vas had already been removed from the external inguinal ring. The pathological findings revealed a pT1 seminoma. The patient has been recurrence-free for 12 months. The present case implies the importance of careful investigation and treatment for intra-abdominal testicular cancer, since intra-abdominal testis might have been overlooked at the time of surgery for undescended testis.