title: Findings of 2-fluoro-2-deoxy-d-glucose positron emission tomography in hemorrhoids.
abstract: BACKGROUND
  Hemorrhoids are very common in adults. The data regarding the incidence of high 2-fluoro-2-deoxy-D: -glucose (FDG) uptake in hemorrhoids is incomplete. In this study, we evaluated FDG uptake in hemorrhoids and calculated the rate of high FDG uptake in these lesions.
  
  
  METHODS
  One hundred and seventy six subjects who undertook whole body FDG-PET for health screening examination were investigated retrospectively. All patients had colonoscopy and 156 subjects were found to have hemorrhoids and 20 had no hemorrhoids. Quantitative analysis of FDG uptake in the anal region was performed by calculating the maximum standard uptake value (SUV(max)).
  
  
  RESULTS
  The SUV(max) ranged from 1.8 to 4.1 (2.8 ± 0.6) for normal subjects and ranged from 1.4 to 8.3 (2.9 ± 0.8) for patients with hemorrhoids. No statistical difference was noted between these two groups using a Student's t-tests. If the highest SUV(max), which was 4.1 in normal subjects, was used as a cutoff, 5.1% (8/156) hemorrhoid patients had a SUV(max) greater than 4.1.
  
  
  CONCLUSIONS
  Hemorrhoids can be one possible cause of focal high FDG uptake in the rectum.
authors.affiliation: Department of Nuclear Medicine, Taichung Veterans General Hospital, Taiwan.
authors.forename: Shih-Chuan
authors.initials: SC
authors.lastname: Tsai
authors.forename: Long-Bin
authors.initials: LB
authors.lastname: Jeng
authors.forename: Jun-Jun
authors.initials: JJ
authors.lastname: Yeh
authors.forename: Cheng-Chieh
authors.initials: CC
authors.lastname: Lin
authors.forename: Jin-Hua
authors.initials: JH
authors.lastname: Chen
authors.forename: Wan-Yu
authors.initials: WY
authors.lastname: Lin
authors.forename: Chia-Hung
authors.initials: CH
authors.lastname: Kao
mesh_terms: D003113:Colonoscopy; D005260:Female; D019788:Fluorodeoxyglucose F18 / Q000493:pharmacokinetics; D006484:Hemorrhoids / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D049268:Positron-Emission Tomography / Q000379:methods*; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D051598:Whole Body Imaging
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18