[Fibroepithelial polyp of the ureter in a child. A case report].

Fibroepithelial polyp of the ureter is benign tumor of mesodermal origin that rarely occurs in children. The most common presenting symptoms are hematuria and flank pain by obstruction of the urinary tract. The etiology of this tumor is not clear. It occurs more frequently in boys and often arises in the proximal ureter and the ureteropelvic junction. The preoperative diagnosis is difficult. We present the case of a 10-year-old boy who had recurrent episodes in the left flank owing to polyps of the lumbar ureter of which the fibroepithelial nature was confirmed by the pathological examination of the surgical specimen. We discuss the clinical presentations, imaging, histological features and treatment options of this unusual tumor through a review of the literature.