title: Standardized uptake values of normal breast tissue with 2-deoxy-2-[F-18]fluoro-D: -glucose positron emission tomography: variations with age, breast density, and menopausal status.
abstract: OBJECTIVE
  This study was conducted to assess the effect of breast density, age, and menopausal status on the 2-deoxy-2-[F-18]fluoro-D: -glucose (FDG) uptake in normal breast tissue by quantitative standardized uptake values (SUV).
  
  
  METHODS
  A total of 96 patients (premenopausal 54; postmenopausal 42) with histologically proven unilateral breast cancer who underwent FDG-positron emission tomography (PET) scans for staging were included in this study. The median age was 52+/-11 years (range 32-79 years). Fifty-nine patients had grade III or IV mammographic density (dense breast), whereas 37 patients had grade I or II breast density (nondense) according to the ACR Lexicon criteria. In the present study, we analyzed maximum and average SUVs for contralateral normal breast.
  
  
  RESULTS
  Maximum and average SUVs for normal dense breasts were 1.02+/-0.30 and 0.84+/-0.27, respectively. Similar values for the nondense breasts were 0.66+/-0.24 and 0.53+/-0.23, respectively. Both maximum and average SUVs of dense breasts were significantly higher than those of nondense breasts (p<0.001). There was no significant difference in SUVs of nipple in patients with dense and nondense breasts. There was no significant effect of age and menopausal status on SUVs of normal breast. However, there were trends of negative relationship, i.e., decreasing SUVs with increasing age.
  
  
  CONCLUSIONS
  There was a significant difference in SUVs between the dense and nondense normal breast. However, the maximum SUVs in the dense breasts were well below the threshold of 2.5, a widely used cutoff value for malignancy. Menopausal status and age do not significantly affect the uptake of FDG.
authors.affiliation: Department of Nuclear Medicine, All-India Institute of Medical Sciences, New Delhi, 110029, India. rkphulia@yahoo.com
authors.forename: Rakesh
authors.initials: R
authors.lastname: Kumar
authors.forename: Anil
authors.initials: A
authors.lastname: Chauhan
authors.forename: Hongming
authors.initials: H
authors.lastname: Zhuang
authors.forename: Prem
authors.initials: P
authors.lastname: Chandra
authors.forename: Mitchell
authors.initials: M
authors.lastname: Schnall
authors.forename: Abass
authors.initials: A
authors.lastname: Alavi
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001823:Body Composition; D001940:Breast / Q000000981:diagnostic imaging / Q000502:physiology*; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D019788:Fluorodeoxyglucose F18 / Q000493:pharmacokinetics*; D006801:Humans; D008327:Mammography / Q000592:standards; D008875:Middle Aged; D009367:Neoplasm Staging; D049268:Positron-Emission Tomography / Q000379:methods / Q000592:standards*; D017698:Postmenopause / Q000502:physiology*; D017697:Premenopause / Q000502:physiology*; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics; D012044:Regression Analysis; D012189:Retrospective Studies; D051598:Whole Body Imaging / Q000592:standards
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18