Urethral polyps are rarely encountered in pediatrics and are thought to be congenital or to result from inflammation. They can occur at any age but most commonly present in young boys. They usually arise near the bladder base, often from the verumontanum, and result in voiding dysfunction with straining and retention. Hematuria is also common. Morphologically they are elongated or pedunculated and are freely mobile within the urethral lumen. Histologically, they are hamartomatous lesions most commonly composed of fibroepithealial tissue and smooth muscle elements. They can be visualized with VCUG protruding into the bladder neck before voiding and may be seen to move downward into the prostatic or bulbar urethra during voiding. Sonographic identification has also been reported. Voiding may be interrupted by an impacted polyp. Signs of outlet obstruction, including bladder trabeculation and hydroureteronephrosis may also be seen. A urethral foreign body, calculus, or blood clot could give a similar appearance. The demonstration of the pedunculated nature of the filling defect confirms the diagnosis of polyp. A primary urethral malignant neoplasm would be extremely rare in this age group. Cystoscopic resection is curative.

 

 

 

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