title: Congenital polyp of the posterior urethra and vesical calculus in a boy.
mesh_terms: D002675:Child, Preschool; D006801:Humans; D008297:Male; D011127:Polyps / Q000151:congenital*; D014523:Urethral Neoplasms / Q000151:congenital*; D001744:Urinary Bladder Calculi / Q000150:complications*