Mitome Taku, Yao Masahiro, Udaka Naoko, Fusayasu Shusei, Izumi Koji, Osaka Kimito, Hayashi Narihiko, Nakaigawa Noboru, Nagashima Yoji, Kubota Yoshinobu
Department of Urology, Yokohama City University Graduate School of Medicine, Yokohama, Kanagawa, Japan;
Department of Pathology, Yokohama City University Hospital, Yokohama, Kanagawa, Japan.
Can Urol Assoc J. 2015 Jan-Feb;9(1-2):E30-2. doi: 10.5489/cuaj.2211.
A 45-year-old man complained of a palpable mass in his left abdomen. Computed tomography showed a horseshoe kidney with a Bosniak type II complicated cyst from a left segment. Three years after his initial examination, due to the growing cystic lesion and the compression imposed on the urinary collecting system and surrounding organs, we performed a left heminephrectomy. The diagnosis was mucinous cystadenoma of the kidney. No recurrence was observed 6 months after surgery. The histopathology was unique since the inner surface of the cyst was covered by a mucin-positive columnar epithelium connected to a urothelium, with continuous transition between the two. This suggests that the mucinous tumour may have originated from a sequestered segment of the renal pelvic epithelium in the renal parenchyma.
一名45岁男性主诉左腹部可触及肿块。计算机断层扫描显示为马蹄肾，左叶有一个博斯尼亚克II型复杂性囊肿。初次检查三年后，由于囊性病变不断增大并对尿路收集系统和周围器官造成压迫，我们进行了左半肾切除术。诊断为肾黏液性囊腺瘤。术后6个月未观察到复发。组织病理学表现独特，囊肿内表面覆盖着与尿路上皮相连的黏液阳性柱状上皮，两者之间有连续过渡。这表明黏液性肿瘤可能起源于肾实质中肾盂上皮的隔离段。
