title: Visceral and subcutaneous adipose tissue FDG uptake by PET/CT in metabolically healthy obese subjects.
abstract: OBJECTIVE
  To measure FDG uptake in visceral (VAT) and subcutaneous (SAT) adipose tissue of metabolically healthy obese (MHO) and metabolically abnormal obese (MAO) compared to metabolically healthy lean (MHL) subjects. Given that MHO has increased metabolic risk, it was hypothesized that MHO and MAO display similar VAT FDG uptake.
  
  
  METHODS
  The 18F-FDG-PET/CT studies of 141 adults (n = 60 MHL, n = 20 MHO, n = 61 MAO) were examined to determine VAT and SAT volumes and FDG uptake. Data on CVD risk factors (BMI, abdominal circumference, blood pressure, serum lipids, and fasting plasma glucose) were collected.
  
  
  RESULTS
  MHO and MAO had similar VAT FDG uptake (P = 0.74), both significantly lower than MHL (P < 0.01) independent of age and gender. SAT FDG uptake was similar across all groups (P > 0.2) independent of age and gender. In all groups, VAT FDG uptake was higher than SAT (P < 0.0001). In separate sub-analyses of obese groups, VAT FDG uptake was more broadly negatively associated with whole-body adiposity than SAT FDG uptake, and FDG uptake in abdominal adipose depots was positively associated with liver density (P < 0.05).
  
  
  CONCLUSIONS
  FDG uptake in VAT of MHO is similar to MAO and lower than MHL, suggesting these subjects may present similar VAT dysfunction.
authors.affiliation: Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.
authors.forename: Adriana L
authors.initials: AL
authors.lastname: Oliveira
authors.forename: Debora C
authors.initials: DC
authors.lastname: Azevedo
authors.forename: Miriam A
authors.initials: MA
authors.lastname: Bredella
authors.forename: Takara L
authors.initials: TL
authors.lastname: Stanley
authors.forename: Martin
authors.initials: M
authors.lastname: Torriani
mesh_terms: D050154:Adiposity / Q000502:physiology; D000328:Adult; D000368:Aged; D001786:Blood Glucose / Q000378:metabolism; D001794:Blood Pressure / Q000502:physiology; D002318:Cardiovascular Diseases / Q000453:epidemiology; D016022:Case-Control Studies; D005260:Female; D019788:Fluorodeoxyglucose F18 / Q000378:metabolism*; D006801:Humans; D050152:Intra-Abdominal Fat / Q000378:metabolism*; D008055:Lipids / Q000097:blood; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000378:metabolism* / Q000503:physiopathology; D049268:Positron-Emission Tomography; D012189:Retrospective Studies; D012307:Risk Factors; D050151:Subcutaneous Fat / Q000378:metabolism*; D014057:Tomography, X-Ray Computed
chemical_list: D001786:Blood Glucose; D008055:Lipids; D019788:Fluorodeoxyglucose F18