精巣を温存しえた精巣Adenomatoid tumorの1例

Abstract

44歳男性。左陰嚢内の無痛性腫瘤を主訴とした。各種腫瘍マーカーはすべて正常であり, 触診, 超音波検査およびMRI所見からは良性腫瘍を考えたが, 悪性腫瘍の可能性も考慮し, 手術が施行された。術中迅速診断では悪性所見は認めず, 腫瘍核出術を行なったところ, 精巣は温存, 病理組織学的には精巣白膜より発生したadenomatoid tumorであった。

A 44-year-old man was referred to our hospital with a chief complaint of a painless left intrascrotal mass, palpable at the lower portion of the left testis. Serum levels of tumor markers, human choriogenic gonadotropin (hCG), hCG-beta, and alpha fetoprotein were within the normal limits. Ultrasonography revealed a hyperechoic mass 13 mm in diameter, which was demonstrated as a hypovascular tumor by Gadrinium-enhanced magnetic resonance imaging. Since the tumor was diagnosed as a benign tumor by frozen section examination intraoperatively, testis-sparing surgery was performed. Histological examination revealed adenomatoid tumor originating from the tunica alubuginea of testis. Adenomatoid tumor of the testis is a rare benign tumor, and the present case is the 36th one in the Japanese literature.