A Mimic of Intra-abdominal Malignancy: Physiological Urinary Excretion of FDG in the Rare Adult Vesicourachal Diverticulum

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Urachal remnant anomalies are rare, and vesicourachal diverticulum is the most uncommon subtype of these anomalies. We present such a rare case of vesicourachal diverticulum that is incidentally discovered during the staging surveillance of a known esophageal cancer with 18F-FDG PET/CT. The physiological urinary excretion of radiopharmaceutical in the vesicourachal diverticulum mimics intra-abdominal malignancy, which resolves spontaneously in the follow-up FDG PET/CT.

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