尾崎 美紀¹, 箱石 容子⁴, 藤田 幸二⁵, 中村 滋¹, 岩崎 光博¹, 西村 浩², 安住 治彦², 綛野 進³, 森本 義彦³, 朝井 均⁶

Miki OSAKI¹, Yoko HAKOISHI⁴, Koji FUJITA⁵, Shigeru NAKAMURA¹, Mitsuhiro IWASAKI¹, Hiroshi NISHIMURA², Haruhiko AZUMI², Susumu KASENO³, Yoshihiko MORIMOTO³, Hitoshi ASAI⁶

¹(医)寺西報恩会長吉総合病院臨床検査科, ²(医)寺西報恩会長吉総合病院内科, ³(医)寺西報恩会長吉総合病院外科, ⁴(医)相愛会相原第二病院臨床検査科, ⁵大阪鉄道病院中央検査室, ⁶大阪教育大学保健管理センター

¹Department of Clinical Laboratory, Nagayoshi General Hospital, ²Department of Internal Medicine, Nagayoshi General Hospital, ³Department of Surgery, Nagayoshi General Hospital, ⁴Department of Clinical Laboratory, Aihara Dai Ni Hospital, ⁵Department of Clinical Laboratory, Osaka Railway Hospital, ⁶Health Administration Center, Osaka University of Education

キーワード : Huge cystic mass , Ultrasonography, Vesicle diverticula

We examined a 51-year-old man who did not complain of dysuria but did complain of abdominal distention and edema of the leg. Bulging extended from the epigastrium to the pelvic cavity. Initial ultrasonography showed a huge cystic mass containing several septum-like structures; bilateral hydronephrosis, ascites, and left pleural effusion were also present. Findings from computed tomography and magnetic resonance imaging were similar to those from ultrasonography, and none led to a correct diagnosis. Surgical removal of the cystic mass was planned under the diagnosis of an unknown abdominal mass. Surgery was called off, however, when the mass disappeared with the spontaneous excretion of about 2.51 of urine on urethral catheterization. Further examination showed the huge multilocular cystic mass to be a distended urinary bladder with three vesical diverticula. Urinary bladder diverticula can be cryptic and protean masses, sometimes assuming unexpected shapes and features that disguise their true identity. This shows that a diagnosis of bladder diverticula should be considered when a sonologist is confronted with a pelvic mass of ambiguous origin.