非同時発生両側性Spermatocytic Seminomaの1例

Abstract

Spermatocytic seminoma was first described as a distinctive histologic variant of pure seminoma by Masson in 1946. Reported herein is a case of spermatocytic seminoma, being a very rare case in Japan. A 49-year-old man was hospitalized because of painless enlargement of left scrotal content. Left orchiectomy was done under a diagnosis of testicular tumor. A histologic study did not confirmed a sure diagnosis and even immature rhabdomyosarcoma was suspected at that time because of resembling histologic features. Retroperitoneal lymphadenectomy was performed and no lymphatic metastasis was proved. Eight months after the operation, the patient was again hospitalized because of an irregular surface of contralateral scrotal content. Right orchiectomy was again performed under a diagnosis of right testicular tumor. Detail histological examinations by light microscope and electron microscope showed pictures of spermatocytic seminoma in the bilateral testicular tumors. The patient is healthy after three years postoperative follow-up period with no evidence of metastatic disease.