title: Hydronephrosis in Acute Uncomplicated Appendicitis.
abstract: BACKGROUND
  Right-sided hydronephrosis as a sign of appendicitis occurs rarely in the literature. To our knowledge, this is the first published account of the occurrence of right-sided hydronephrosis as a result of uncomplicated appendicitis.
  
  
  METHODS
  We describe a 15 year old patient referred to the emergency department with suspected appendicitis. Additional ultrasound examination showed a right-sided hydronephrosis. This finding was discussed with the urologist who noted the hydronephrosis as a chance finding. Because of persistent clinical suspicion of appendicitis, a diagnostic laparoscopy was performed. A retrocaecal appendicitis with secondary hydronephrosis was found.
  
  
  CONCLUSIONS
  Right-sided hydronephrosis may be a sign of acute uncomplicated (retrocaecal) appendicitis. It is important to keep sight of these findings, especially in view of the emphasis on imaging techniques in the current Dutch guideline on appendicitis.
authors.affiliation: a Department of Surgery , The Netherlands.
authors.forename: T
authors.initials: T
authors.lastname: Schok
authors.affiliation: a Department of Surgery , The Netherlands.
authors.forename: S
authors.initials: S
authors.lastname: Austen
authors.affiliation: b Department of Urology , The Netherlands.
authors.forename: R B C B
authors.initials: RB
authors.lastname: Lewicz
authors.affiliation: c Department of Radiology , The Netherlands.
authors.forename: F H R van der
authors.initials: FH
authors.lastname: Zande
authors.affiliation: d Department of Emergency Medicine, Viecuri Medical Center, Venlo , The Netherlands.
authors.forename: N A L R
authors.initials: NA
authors.lastname: Peters
authors.affiliation: a Department of Surgery , The Netherlands.
authors.forename: H M J
authors.initials: HM
authors.lastname: Janzing
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D001062:Appendectomy / Q000379:methods*; D001064:Appendicitis / Q000150:complications* / Q000175:diagnosis* / Q000601:surgery; D004636:Emergency Service, Hospital; D005500:Follow-Up Studies; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology* / Q000503:physiopathology; D010535:Laparoscopy / Q000379:methods; D008297:Male; D012720:Severity of Illness Index; D016896:Treatment Outcome; D018608:Ultrasonography, Doppler / Q000379:methods