A Case of a Bladder Diverticulum Incidentally Finding on PET/CT

膀胱憩室發現位置和相關疾病許多關連。膀胱憩室會增加急性腎功能衰竭，外傷，膀胱破裂，瘻管形成和感染之風險。膀胱憩室患者一般無臨床症狀且偶然發現於正子電腦斷層融合影像。一位79歲男性皮膚B細胞淋巴瘤（cutaneous B-cell lymphoma）病患接受氟化去氧葡萄糖於正子電腦斷層檢查以進行追蹤。正子電腦斷層影像（PET images），偶然發現膀胱右前方有袋狀氟-18 去氧葡萄糖攝取。剛開始被認為可能是轉移。但是，將正子電腦斷層影像（PET images）和電腦斷層影像（CT images）對照後發現是膀胱憩室。此外，我們發現膀胱和膀胱右前方憩室有類似最大之標準攝取值（maximum of standard uptake value,SUV_(max)），標準攝取值分別為10.93和11.02。這個案例說明正子電腦斷層影像若無電腦斷層影像同時判讀的話，有可能造成錯誤的判讀。因此，在判讀影像需將正子電腦斷層影像、電腦斷層影像和融合影像（integrated PET/CT images）一起判讀才能提供正確的診斷。

關鍵字

膀胱憩室；氟-18去氧葡萄糖；正子電腦斷層融合影像

並列摘要

Bladder diverticula can express many problems associated with their locations. Acute renal failure, trauma, bladder rupture, fistula formation, and infection are at increased risks by bladder diverticula. It is generally asymptomatic and found incidentally on positron emission tomography (PET)/CT images. A 79-year-old man with cutaneous B-cell lymphoma was assessed [^(18)F]-2-deoxy-2-(^(18)F)fluoro-D-glucose (FDG) PET/CT scan for follow-up. In PET images, there was an unexpected bulging pouch intense [^(18)F]FDG uptake at right anterior aspect of urinary bladder. It was considered to be a metastasis of his cancer at first. But, correlation finding of PET images to concurrent CT data revealed it to be a bladder diverticulum. Besides, we found the right anterior aspect of urinary bladder has the similar data to the maximum of standard uptake value (SUV_(max)) as the bladder activity (SUV_(max)=10.93) and is consistent with a bladder diverticulum (SUV_(max)=11.02). Presented case demonstrates the possibility of misinterpreting PET images without combining relevant CT data. Therefore, it is important to combine analysis of PET and CT data in the interpretation of integrated PET/CT images to reveal the correct diagnosis.

並列關鍵字

bladder diverticulum ； [^(18)F]FDG ； PET/CT images

國際替代計量

A Case of a Bladder Diverticulum Incidentally Finding on PET/CT

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