Post diuretic [¹⁸F]-fluorodeoxyglucose PET scan for detection of residual/recurrent bladder tumor

Conventionally ¹⁸F-Fluorodeoxyglucose (FDG) Positron emission tomography (PET) has been considered to be of limited value for detection of bladder cancer because of interference by the FDG excreted in urine. An 83 year old male with urothelial carcinoma of the bladder underwent trans-urethral resection of bladder tumor (TURBT) and was post operatively advised FDG PET scan for assessing the residual locoregional disease and distant spread if any. We carried out a dual phase PET-CT scan with addition of intravenous frusemide and oral hydration. This modified scanning technique achieved adequate washout of urinary FDG and was successful in demonstrating the residual bladder tumor and its multi focal nature.