title: Clinical usefulness of controlled attenuation parameter to screen hepatic steatosis for potential donor of living donor liver transplant.
abstract: OBJECTIVE
  Hepatic steatosis is associated with an increased risk of graft loss. Although the controlled attenuation parameter (CAP), a process based on transient elastography, has been suggested as a noninvasive method of assessing hepatic steatosis, to date, there is no study on the usefulness of CAP as a single screening tool for detecting hepatic steatosis in potential living donor liver. We evaluated the accuracy of CAP for detecting hepatic steatosis in potential liver donors.
  
  
  METHODS
  All potential donors of living-donor liver transplantation who underwent a CAP assessment and ultrasonography-guided liver biopsy were enrolled. The steatosis grades were as follows: S0 less than 5%; S1, 5-33%; S2, 34-66%; and S3, more than 66%.
  
  
  RESULTS
  According to the liver biopsies, 19 (34.5%) patients had S0, 30 (54.5%) patients had S1, and 6 (11.0%) patients had S2. The CAP value was correlated positively with BMI (r=0.242, P=0.01), waist circumference (r=0.268, P=0.006), hip circumference (r=0.334, P=0.001), Magnetic resonance fat signal fraction (r=0.465, P=0.001), and histologic steatosis grade (r=0.542, P=0.001). The area under the receiver operator characteristic curve for the diagnosis of steatosis (≥S2) by CAP was 0.88 (sensitivity 83.3% and specificity 81.6% at a cutoff value of 276 dB/m, P<0.0001).
  
  
  CONCLUSIONS
  This study suggests that CAP, as a simple and noninvasive preoperative assessment for hepatic steatosis, may be sufficient for identifying and thus excluding significant hepatic steatosis (>33%) in potential liver donors.
authors.affiliation: Departments of aInternal Medicine bSurgery, Division of Hepato-Biliary-Pancreatic Surgery and Transplantation cDepartment of Radiology, College of Medicine, Pusan National University, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea.
authors.forename: Young Mi
authors.initials: YM
authors.lastname: Hong
authors.forename: Ki Tae
authors.initials: KT
authors.lastname: Yoon
authors.forename: Mong
authors.initials: M
authors.lastname: Cho
authors.forename: Chong Woo
authors.initials: CW
authors.lastname: Chu
authors.forename: Je Ho
authors.initials: JH
authors.lastname: Rhu
authors.forename: Kwang Ho
authors.initials: KH
authors.lastname: Yang
authors.forename: Jun Woo
authors.initials: JW
authors.lastname: Lee
mesh_terms: D000328:Adult; D019540:Area Under Curve; D046148:Donor Selection; D054459:Elasticity Imaging Techniques; D005234:Fatty Liver / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D061705:Image-Guided Biopsy; D016031:Liver Transplantation / Q000009:adverse effects / Q000379:methods*; D019520:Living Donors; D008279:Magnetic Resonance Imaging; D008297:Male; D011237:Predictive Value of Tests; D012372:ROC Curve; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012720:Severity of Illness Index; D055815:Young Adult