Castleman's disease in the pararenal retroperitoneal space, which is indistinguishable from renal cell carcinoma: a case report

Abstract

A 29-year-old woman was hospitalized in our institute with the diagnosis of a right renal mass by ultrasonography on medical checkup. Computerized tomography showed a lower pole solid mass (9 cm in diameter), which was enhanced homogeneously, as well as the renal cortex in the arterial phase. The tumor was excised using radical nephrectomy based on the preoperative diagnosis of renal cell carcinoma, and thus lymph node dissection was also performed. The excised tumor was isolated from the kidney in a thin capsule, macroscopically. Postoperative pathological diagnosis revealed hyaline vascular type Castleman's disease. There was no recurrence at 1 year after the operation without any adjuvant therapy because of the complete resection.

29歳, 女性。健診超音波検査で右腎腫瘍を指摘され当科を受診した。CTでは右腎下極に径9cm, 内部均一で動脈相にて腎実質と同等に造影される腫瘍を認めた。腎細胞癌の術前診断にて根治的腎摘除術およびリンパ節郭清術を施行した。切除標本肉眼所見では腫瘍は薄い被膜を有し腎と完全に隔てられていた。術後病理診断はCastleman病(hyaline vascular type)であった。術後1年を経過した時点で再発は認められていない。(著者抄録)