由 t1b 肾细胞癌继发的孤立性同步转移性胃癌：病例报告和系统评价。

Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, and Asan Digestive Disease Research Institute, Seoul, Korea.

Gut Liver. 2012 Jul;6(3):388-94. doi: 10.5009/gnl.2012.6.3.388. Epub 2012 Jul 12.

Metastasis to the stomach from renal cell carcinoma (RCC) is extremely rare. Usually, gastric metastasis seems to be a late event in patients with RCC and is accompanied by disseminated tumor spread to other organs. Solitary synchronous gastric metastasis from small, localized RCC has rarely been reported. We report a case of 79-year-old man with synchronous gastric metastasis presenting with a single erosive lesion from pT1 RCC. The patient underwent radical nephrectomy and endoscopic resection for metastatic gastric cancer. The resected specimen showed an ill-defined tumor, approximately 0.6 cm long, with a clear resection margin. The morphologic features of the tumor cells were consistent with those of metastatic RCC of the clear cell type. At 6 months's follow-up, the patient did not show local recurrence or additional metastasis on upper endoscopy and computed tomography scan.

胃转移来自肾细胞癌（RCC）极为罕见。通常，胃转移似乎是 RCC 患者的晚期事件，并伴有播散性肿瘤扩散至其他器官。来自小的局限性 RCC 的孤立性同步胃转移很少有报道。我们报告了一例 79 岁男性，患有同步胃转移，表现为 pT1 RCC 的单个侵蚀性病变。患者接受了根治性肾切除术和内镜下胃转移癌切除术。切除标本显示边界清楚的肿瘤，约 0.6 厘米长。肿瘤细胞的形态特征与透明细胞型转移性 RCC 一致。在 6 个月的随访中，上内窥镜和计算机断层扫描未显示局部复发或其他转移。