title: Acute pancreatitis in children: CT findings of intra- and extrapancreatic fluid collections.
abstract: OBJECTIVE
  To determine the location and importance of fluid collections in children with acute pancreatitis.
  
  
  METHODS
  The authors retrospectively reviewed the abdominal computed tomographic (CT) scans of 28 children with acute pancreatitis. CT scans were evaluated for pancreatic size and distribution of intra- and extrapancreatic fluid collections. Extrapancreatic fluid was classified as (a) peritoneal, (b) retroperitoneal, (c) mesenteric, or (d) ligamentous.
  
  
  RESULTS
  Fourteen children (50%) had complicated pancreatitis associated with fluid collections. Intrapancreatic fluid was identified in only two patients (7%), whereas extrapancreatic fluid was seen in 14 (50%). Extrapancreatic fluid was most often seen in the anterior pararenal space, followed by the lesser sac, lesser omentum, and transverse mesocolon. The fluid collections diminished spontaneously in 11 patients (78%). Three patients with persistent fluid collections required surgical intervention for associated abnormalities.
  
  
  CONCLUSIONS
  Intrapancreatic fluid collections are rare in children with pancreatitis. Extrapancreatic fluid collections tend to be extensive, but most diminish spontaneously.
authors.affiliation: Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO 63110.
authors.forename: L R
authors.initials: LR
authors.lastname: King
authors.forename: M J
authors.initials: MJ
authors.lastname: Siegel
authors.forename: D M
authors.initials: DM
authors.lastname: Balfe
mesh_terms: D000208:Acute Disease; D001202:Ascitic Fluid / Q000000981:diagnostic imaging; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D010179:Pancreas / Q000000981:diagnostic imaging; D010195:Pancreatitis / Q000000981:diagnostic imaging*; D012187:Retroperitoneal Space / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed