title: Pelvo-ureteric junction obstruction in the lower pole moiety of a duplex kidney with an associated intraparenchymal abscess: a case report.
abstract: BACKGROUND
  Pelvo-ureteric junction obstruction and duplex kidney are common radiological findings. However, pelvo-ureteric junction obstruction in a duplex kidney is a rare finding. We present the case of a patient who presented with septic complications secondary to this combination.
  
  
  METHODS
  An adult woman presented with urinary sepsis, and her initial investigation with ultrasound revealed hydronephrosis of the lower moiety of a duplex kidney. Further investigations with computed tomography and magnetic resonance imaging showed an associated intrarenal abscess and a pelvo-ureteric junction obstruction of the lower moiety of a duplex kidney.
  
  
  CONCLUSIONS
  This patient had a rare and unreported complication of an unusual congenital urological abnormality. This case report highlights the role of multiple imaging modalities in correct diagnosis for clinical management.
authors.affiliation: Department of Radiology, St James University Hospital, UK. jlenton@doctors.org.uk
authors.forename: James
authors.initials: J
authors.lastname: Lenton
authors.forename: Tze
authors.initials: T
authors.lastname: Wah