title: Clinical characteristics of obstructive uropathy associated with rotavirus gastroenteritis in Japan.
abstract: OBJECTIVE
  Rotavirus gastroenteritis is severe and often results in dehydration and pre-renal azotemia. However, we have encountered four children with acute obstructive uropathy associated with acute rotavirus gastroenteritis, and several similar cases have been reported. Therefore, the aim of the present study was to clarify the epidemiology and clinical features of acute obstructive uropathy associated with acute rotavirus gastroenteritis in Japanese children.
  
  
  METHODS
  We sent questionnaires to all members of the Japanese Society for Nephrology and all authors who had published case reports of this disease in Japan, inquiring about patient age at diagnosis, sex, the type of stones, laboratory data and other factors.
  
  
  RESULTS
  21 reported patients were evaluable, ranging from 0.4 to 3 years. The sex distribution showed a strong male prevalence. Oliguria had appeared about 7 days after the onset of gastroenteritis. Most of the patients showed hyperuricemia and hyponatremia. The stones consisted mainly of ammonium acid urate. The patients were discharged with normal renal function.
  
  
  CONCLUSIONS
  Although obstructive uropathy associated with rotavirus gastroenteritis is very rare, this disease condition should be explored when anuria is refractory to sufficient fluid replacement therapy or when oliguria persists despite recovery of the gastrointestinal symptoms.
authors.affiliation: Department of Pediatrics, Osaka Medical College, Osaka, Japan. ped006@poh.osaka-med.ac.jp
authors.forename: Akira
authors.initials: A
authors.lastname: Ashida
authors.forename: Mikiya
authors.initials: M
authors.lastname: Fujieda
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Ohta
authors.forename: Hyogo
authors.initials: H
authors.lastname: Nakakura
authors.forename: Hideki
authors.initials: H
authors.lastname: Matsumura
authors.forename: Taku
authors.initials: T
authors.lastname: Morita
authors.forename: Takashi
authors.initials: T
authors.lastname: Igarashi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tamai
mesh_terms: D044466:Asian People / Q000706:statistics & numerical data; D002675:Child, Preschool; D005260:Female; D005759:Gastroenteritis / Q000208:ethnology* / Q000821:virology*; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging / Q000208:ethnology / Q000821:virology; D007223:Infant; D007564:Japan / Q000453:epidemiology; D008297:Male; D012189:Retrospective Studies; D012400:Rotavirus Infections / Q000208:ethnology*; D014463:Ultrasonography; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging / Q000208:ethnology* / Q000821:virology*; D014545:Urinary Calculi / Q000000981:diagnostic imaging / Q000208:ethnology / Q000821:virology