title: Imaging appearance in acute liver failure: correlation with clinical and pathology findings.
abstract: OBJECTIVE
  Acute liver failure (ALF) is characterized by sudden liver injury without underlying chronic liver disease. Excluding underlying cirrhosis in these patients is often difficult and liver biopsy may be impractical. We review the imaging appearance of acute hepatic failure in patients who underwent transplant and correlate these findings with clinical, laboratory and pathology parameters.
  
  
  METHODS
  This is a retrospective review of 47 patients without known chronic liver disease who presented to three institutions between 2002 and 2010 with ALF, 46 of which underwent subsequent orthotopic liver transplantation. Pre-transplant ultrasound, computed tomography and magnetic resonance imaging scans were reviewed for parenchymal homogeneity, surface nodularity and evidence of portal hypertension. Explant histopathology, laboratory values and time intervals between symptom onset to initial imaging and transplant were correlated with imaging findings.
  
  
  RESULTS
  The majority of patients with ALF had abnormal radiographic findings. Ascites was seen in 65% of patients. Splenomegaly, collateral vessel formation and hepatofugal flow in the portal vein were present in 28, 15 and 9% of patients, respectively. Nodular liver surface was noted in 23% of patients, more commonly in patients who had been ill for more than 7 days. Liver surface nodularity correlated with massive hepatic necrosis on histology and wrinkled capsule on visual inspection of explanted liver specimen.
  
  
  CONCLUSIONS
  Imaging findings in ALF was variable and can resemble cirrhosis. Assessment for underlying cirrhosis in the setting of liver failure should not be based on imaging findings.
authors.affiliation: Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
authors.forename: Miriam
authors.initials: M
authors.lastname: Romero
authors.forename: Suzanne L
authors.initials: SL
authors.lastname: Palmer
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Kahn
authors.forename: Lauren
authors.initials: L
authors.lastname: Ihde
authors.forename: Leah Muhm
authors.initials: LM
authors.lastname: Lin
authors.forename: Anne
authors.initials: A
authors.lastname: Kosco
authors.forename: Ron
authors.initials: R
authors.lastname: Shinar
authors.forename: Aslan
authors.initials: A
authors.lastname: Ghandforoush
authors.forename: Linda S
authors.initials: LS
authors.lastname: Chan
authors.forename: Lydia M
authors.initials: LM
authors.lastname: Petrovic
authors.forename: Linda S
authors.initials: LS
authors.lastname: Sher
authors.forename: Tse-Ling
authors.initials: TL
authors.lastname: Fong
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging / Q000473:pathology; D017114:Liver Failure, Acute / Q000175:diagnosis* / Q000473:pathology* / Q000601:surgery; D016031:Liver Transplantation; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D055815:Young Adult