陰嚢内に播種した腹腔内desmoplastic small round cell tumor

Desmoplastic Small Round Cell Tumor Disseminated to Paratesticular Region:A Case Report

　42歳，男性。右季肋部痛を主訴に受診した。触診で右上腹部に圧痛を伴う手拳大の腫瘤を認め，右陰嚢内にも辺縁不整で超鶏卵大の腫瘤を触知した。CT検査で右腹腔内に直径9.5cmの腫瘤を，肝に多発性腫瘍を認めた。右精巣腫瘍および腹腔内転移を疑い，高位精巣摘除術を施行した。摘出標本では精巣に異常はなく，精巣周囲に腫瘍がみられ，病理組織学的診断はdesmoplastic small round cell tumor（結合織性小円形細胞腫）であった。

A 42-year-old man presented with the chief complaint of right flank pain and right scrotal mass. Computerized tomography of the abdomen revealed intra-abdominal solid mass and multiple metastases in the liver. Right high-orchiectomy was performed. The specimen showed that multiple tumors were in the tunica vaginalis with normal testis and patent processus vaginalis. Pathological diagnosis was desmoplastic small round cell tumor (DSRCT). DSRCT at the tunica vaginalis were suggestive of dissemination from abdominal cavity.