Purpose or Case Report: Congenital urethral polyps are a rare benign fibroepithelial lesion, typically arising from the verumontanum. We present a case of a 2 day old neonate undergoing renal ultrasound for follow up of prenatally diagnosed urinary tract dilation. Ultrasound demonstrated severe bilateral central and peripheral caliyectasis with parenchymal thinning, bilateral distal ureterectasis and marked bladder wall thickening. An echogenic soft tissue nodule was visualized at the bladder outlet. Subsequent VCUG showed a rounded filling defect intermittently located in the posterior urethra and bladder neck, suspicious for a diving mobile polyp. Transurethral resection of the polyp was performed. This case highlights an unusual cause of bladder outlet obstruction in neonates which can mimic the presentation and imaging appearance of posterior urethral valves.
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