腎腫瘤を形成した悪性リンパ腫の1例

MALIGNANT LYMPHOMA FORMING A RENAL MASS:A CASE REPORT

　71歳，男性。発熱を主訴に当科受診。CTスキャンで右腎下極に充実性腫瘤を認め，右腎動脈造影でこの腫瘤は乏血管性であった。腎細胞癌または腎被膜腫瘍を疑い，根治的右腎摘除術を施行。病理組織学的に非ホジキンリンパ腫，びまん性中細胞型（LSG分類）と診断された。リンパ球表面マーカーの検索では，T細胞型であった。術後，化学療法（THP—COP）を5クール施行し，3年3か月経過した現在，再発や転移を認めていない。

A 71-year-old male was refered to our department with the chief complaint of periodical fever. CT scanrevealed a solid mass lesion on the lower pole of the right kidney. The lesion was hypovascular in right renalarteriography. Renal cell carcinoma or renal capsular tumor was suspected, so right transperitoneal radicalnephrectomy was performed. Histopathological findings were compatible with non-Hodgkin's lymphoma,diffuse, medium sized cell type. Immunohistochemical surface marker study revealed that the tumor was Tcell lymphoma. He received 5 courses of chemotherapy (THP-COP) postoperatively.