Hamano Itsuto, Hatakeyama Shingo, Soma Osamu, Ishibashi Yusuke, Yoneyama Tohru, Yoneyama Takahiro, Hashimoto Yasuhiro, Nishimura Shoji, Koie Takuya, Ohyama Chikara
Department of Urology Hirosaki University Graduate School of Medicine Hirosaki Japan.
Department of Advanced Transplant and Regenerative Medicine Hirosaki University Graduate School of Medicine Hirosaki Japan.
IJU Case Rep. 2019 Mar 6;2(3):124-127. doi: 10.1002/iju5.12056. eCollection 2019 May.
Lumbar ectopic kidney is a rare developmental renal anomaly. We report a case of renal cell carcinoma in lumbar ectopic kidney with an abnormality of the main renal artery piercing the renal parenchyma.
A 70-year-old female was referred to our division with an incidentally diagnosed ectopic kidney. Computed tomography angiography detected the right kidney at the lumbar (L3-L4) level with an early-enhanced 44-mm-diameter mass. The kidney had a laterally facing renal hilum and renal arteries piercing the renal parenchyma from the medial side. An open radical nephrectomy was performed using a peritoneal approach, and no perioperative complications were observed. The pathological diagnosis was clear cell carcinoma (pT1).
This is the first case report of renal cell carcinoma in a lumbar ectopic kidney. It highlights the importance of preoperational imaging for aberrant artery and careful surgical management.
腰椎异位肾是一种罕见的肾脏发育异常。我们报告一例腰椎异位肾合并肾细胞癌病例，其主要肾动脉穿入肾实质存在异常。
一名70岁女性因偶然发现异位肾转诊至我科。计算机断层血管造影显示右肾位于腰椎（L3-L4）水平，有一个直径44mm的早期强化肿块。该肾肾门朝外侧，肾动脉从内侧穿入肾实质。采用经腹入路行开放性根治性肾切除术，未观察到围手术期并发症。病理诊断为透明细胞癌（pT1）。
这是首例关于腰椎异位肾合并肾细胞癌的病例报告。它凸显了术前对异常动脉进行影像学检查以及谨慎手术管理的重要性。
