An Incidental Finding of Bladder Diverticulum With Entrapped Radioactive Urine Demonstrated on FDG PET/CT

膀胱憩室合併貯留尿液活性－一FDG正子造影之偶然發現

楊志祥(Chih-Hsiang Yang) ； 劉家龍(Chia-Lung Liu) ； 陳愫美(Su-Mei Chen)

《核子醫學暨分子影像雜誌》 34卷1期 (2021/03) Pp. 21-25

https://doi.org/10.6332/ANMMI.202103_34(1).0003

摘要

An 81-year-old man had a history of bronchogenic adenocarcinoma diagnosed after a computed tomography (CT) guided biopsy. A stage IB disease was assigned by fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT performed for the cancer staging. An incidental finding of ovoid intense FDG activity bulging out the urinary bladder was demonstrated in the dual-time-point scan. After administration of diuretics, the delayed phase scan was taken and the intense FDG activity was still noted. A bladder neoplasm or metastasis was considered initially, but there was no suspicious soft tissue density in the corresponding CT images. On the contrary, there was a bulging fluid-density pouch in the bladder wall and a bladder diverticulum with entrapped radioactive urine was diagnosed.

關鍵字

false positive ； bladder diverticulum ； urinary bladder ； FDG PET/CT

並列摘要

81歲男性病患因肺腺癌而安排氟代去氧葡萄糖（fluorodeoxyglucose, FDG）正子斷層造影檢查，臨床分期為stage IB。在其正子造影偶然發現於膀胱側壁有一膨出之強烈放射活性圓點，給予病患利尿劑後進行延遲相造影，其放射活性圓點仍然存在於延遲影像上，膀胱腫瘤或肺癌轉移為初始臆斷，但仔細比對電腦斷層影像後，發現在相同位置上並無異常之軟組織病灶，相反的，有一膨出之液體密度病灶於膀胱壁上，膀胱憩室合併貯留尿液活性因而被診斷。

並列關鍵字

偽陽性 ； 膀胱憩室 ； 膀胱 ； FDG正子斷層造影