title: Pedunculated polyp of posterior urethra in children causing reflux and hydronephrosis.
mesh_terms: D002675:Child, Preschool; D003238:Connective Tissue / Q000473:pathology; D003558:Cystoscopy; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging / Q000209:etiology*; D008297:Male; D009132:Muscles / Q000473:pathology; D011127:Polyps / Q000150:complications* / Q000151:congenital / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D014523:Urethral Neoplasms / Q000150:complications* / Q000151:congenital / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D014555:Urination Disorders / Q000209:etiology; D014567:Urography; D014718:Vesico-Ureteral Reflux / Q000000981:diagnostic imaging / Q000209:etiology*