title: Ureteropelvic Junction Obstruction by a Long Intraluminal Polyp and a Concurrent Crossing Vein in a Symptomatic 8-Year-old Child.
abstract: Ureteropelvic junction obstruction due to intrinsic causes is often diagnosed antenatally during routine ultrasonography. Cases of extrinsic obstruction often present later and symptomatically, during childhood. We describe the rare case of an 8-year-old boy with a 2-day history of severe left flank pain, no fevers, and Society of Fetal Urology grade 3 hydronephrosis on ultrasonography. Laparoscopic dismembered pyeloplasty revealed a left ureteropelvic junction obstruction secondary to a large fibroepithelial polyp in the proximal ureter with a concomitant anterior crossing vein. We also provide a focused review of the pertinent published literature.
authors.affiliation: McMaster University, Hamilton, Ontario, Canada.
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Carter Ramirez
authors.affiliation: Division of Urology, Department of Surgery, McMaster Children's Hospital, McMaster University, Hamilton, Ontario, Canada.
authors.forename: Hin Yu Vincent
authors.initials: HY
authors.lastname: Tu
authors.affiliation: Division of Urology, Department of Surgery, McMaster Children's Hospital, McMaster University, Hamilton, Ontario, Canada; McMaster Pediatric Surgery Research Collaborative, Department of Surgery, McMaster University, Hamilton, Ontario, Canada. Electronic address: braga@mcmaster.ca.
authors.forename: Luis H
authors.initials: LH
authors.lastname: Braga
mesh_terms: D000714:Anastomosis, Surgical; D002648:Child; D006801:Humans; D007682:Kidney Pelvis / Q000098:blood supply; D010535:Laparoscopy / Q000379:methods*; D008297:Male; D011127:Polyps / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D019651:Plastic Surgery Procedures / Q000379:methods*; D014513:Ureter / Q000601:surgery; D014516:Ureteral Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D014517:Ureteral Obstruction / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D014567:Urography; D013520:Urologic Surgical Procedures / Q000379:methods*; D054079:Vascular Malformations / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D014656:Vascular Surgical Procedures / Q000379:methods; D014680:Veins / Q000002:abnormalities / Q000601:surgery