除了良性及惡性腫瘤外，感染、發炎等病灶也會有醣解作用增強的情形，在氟－18-去氧葡萄糖正子造影會出現攝取增加。本病例報告描述一個肺癌病人，在其治療前的分期正子造影中發現不平常膽囊壁的氟－18-去氧葡萄糖攝取增加。腹部超音波檢查顯示疑似膽囊炎。雖然病人沒有膽囊炎症狀，但是配合正子造影的發現，該病人可能有無臨床症狀的膽囊發炎。

Other than malignancy, benign processes, such as infection, inflammation and granulomatous diseases, may also show enhanced glycolysis when stimulated and result in increased 18F-fluoro-2-deoxy-D-glucose (FDG) uptake. In this case report, we present a patient of lung cancer with an unusual pattern of FDG uptake on the rim of the gallbladder in FDG positron emission tomography (PET) for staging his lung malignancy. The findings in subsequent ultrasonography signified possible cholecystitis for the patient. Although lacking clinical symptom with our patient, it is very likely that asymptomatic cholecystitis have occurred and resulted in the increased FDG uptake of his gallbladder wall.