Kamijo T, Nishimura Y, Tominaga T, Yamaguchi K, Hirano Y
Department of Urology, Mitsui Memorial Hospital.
Hinyokika Kiyo. 1992 Oct;38(10):1161-3.
We report a case of renal cell carcinoma within a renal cyst. A 45-year-old man visited our hospital with the chief complaint of left back pain. Ultrasonography was examined by a physician, and it revealed a right renal cyst by chance. Computed tomography demonstrated a thick wall in the cyst which showed enhancement of density with contrast medium. The physician followed the cystic lesion periodically, by ultrasonography and computed tomography. The cyst on volume did not change, but the thick wall had a tendency to develop to inner space. The patient was referred to our department. Angiography was performed, and it showed neovascularity and tumor staining. We diagnosed the renal tumor in a renal cyst. Transabdominal right radical nephrectomy was performed on 18 June, 1991. The resected specimen involved a mall tumor (2.5 x 2.0 cm) in the cyst. Histological examination of the tumor was renal cell carcinoma which was well capsulated by connective tissue without invasion to normal parenchyma and perirenal fat. We speculated that the renal cell carcinoma originated from the cyst wall and it developed to inner cystic space. The natural history of the renal cell carcinoma in a renal cyst is not clear. Our case shows a type of its history. We reviewed and discussed the types and diagnosis of the renal cell carcinoma in a renal cyst.
我们报告一例肾囊肿内肾细胞癌的病例。一名45岁男性因左侧背痛为主诉前来我院就诊。医生进行了超声检查，偶然发现一个右肾囊肿。计算机断层扫描显示囊肿壁增厚，注入造影剂后密度增强。医生通过超声和计算机断层扫描定期随访该囊性病变。囊肿体积未变，但增厚的壁有向内部空间发展的趋势。该患者被转诊至我科。进行了血管造影，显示有新生血管和肿瘤染色。我们诊断为肾囊肿内肾肿瘤。1991年6月18日进行了经腹右肾根治性切除术。切除标本包含囊肿内一个小肿瘤（2.5×2.0厘米）。肿瘤组织学检查为肾细胞癌，被结缔组织良好包裹，未侵犯正常实质和肾周脂肪。我们推测肾细胞癌起源于囊肿壁并向囊肿内部空间发展。肾囊肿内肾细胞癌的自然病程尚不清楚。我们的病例展示了其病程的一种类型。我们回顾并讨论了肾囊肿内肾细胞癌的类型及诊断。
