title: Crossed fused renal ectopia presenting as recurrent lower abdominal pain and urinary tract infection.
abstract: BACKGROUND
  Crossed fused renal ectopia is a relatively rare condition which may remain undiagnosed for a long time. Renal function is usually preserved. It usually involves the left kidney. It is usually associated with mal-rotation, and may be a cause of urinary tract infection, hydronephrosis and renal calculi.
  
  
  METHODS
  We report a case of a 15-year old boy who was referred to our clinic with complaints of abdominal pain, and an ultrasound report of "absent right kidney".
  
  
  RESULTS
  Urine examination indicated a partially treated infection, but the tests of kidney functions were normal. Intravenous urography confirmed crossed fused renal ectopia, and a flush aortogram showed two anomalous right renal arteries arising from the left side of aorta.
  
  
  CONCLUSIONS
  An "absent" kidney in its normal location should prompt further investigations. Recurrent chronic lower abdominal pain and urinary tract infection in a young person may be due to congenital renal abnormality. Evaluation of persistent urinary abnormalities in a child should include screening for congenital abnormalities.
authors.affiliation: Department of Medicine, University of Abuja Teaching Hospital, Abuja, Nigeria. soajayi@hotmail.com
authors.forename: S
authors.initials: S
authors.lastname: Ajayi
authors.affiliation: Department of Medicine, University of Abuja Teaching Hospital, Abuja, Nigeria.
authors.forename: M
authors.initials: M
authors.lastname: Mamven
authors.affiliation: Department of Radiology, Aminu Kano Teaching Hospital,Kano, Nigeria.
authors.forename: A
authors.initials: A
authors.lastname: Tabari
authors.affiliation: Department of Medicine, University of Abuja Teaching Hospital, Abuja, Nigeria.
authors.forename: D
authors.initials: D
authors.lastname: Ojji
authors.affiliation: Department of Radiology, University of Abuja Teaching Hospital, Abuja, Nigeria.
authors.forename: A
authors.initials: A
authors.lastname: Ibrahim
mesh_terms: D015746:Abdominal Pain / Q000175:diagnosis* / Q000209:etiology; D000293:Adolescent; D000792:Angiography; D002828:Choristoma / Q000150:complications / Q000151:congenital* / Q000000981:diagnostic imaging; D006801:Humans; D007668:Kidney / Q000002:abnormalities* / Q000000981:diagnostic imaging; D007674:Kidney Diseases / Q000150:complications / Q000151:congenital* / Q000000981:diagnostic imaging; D008297:Male; D012008:Recurrence; D012077:Renal Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging; D014552:Urinary Tract Infections / Q000175:diagnosis* / Q000209:etiology; D014567:Urography