Rare Presentation of Metastatic Endometrioid Adenocarcinoma of Uterus Mimicking as Second Primary in Urinary Bladder on F-Fluorodeoxyglucose Positron-Emission Tomography/Computed Tomography.

We present a case of endometrioid carcinoma metastasis in the bladder mimicking as the second primary of urinary bladder on F-fluorodeoxyglucose positron-emission tomography/computed tomography (F-FDG PET/CT). The presentations of bladder lesions on F-FDG PET/CT are varied, and rare presentations of common malignancies can pose a significant diagnostic challenge as in the index case and highlight the importance of histopathological examination to confirm any unusual FDG uptake confounding the diagnosis.