title: Persistent or recurrent bronchogenic carcinoma: detection with PET and 2-[F-18]-2-deoxy-D-glucose.
abstract: OBJECTIVE
  To assess positron emission tomography (PET) with 2-[fluorine-18]-2-deoxy-D-glucose (FDG) in the differentiation of recurrent bronchogenic carcinoma from fibrosis after therapy.
  
  
  METHODS
  Any patient treated for bronchogenic carcinoma who had a residual chest radiographic abnormality was eligible. Forty-three patients (mean age, 63.5 years) participated. Chest radiographs and thoracic computed tomographic scans helped localize the abnormality prior to PET. Semiquantitative analysis was performed on FDG PET images with calculated standardized uptake ratios (SURs). Sensitivity, specificity, and confidence intervals for recurrent disease were determined.
  
  
  RESULTS
  Thirty-five patients had recurrent or persistent tumor (median SUR, 7.6; range, 1.9-18.7). Eight patients had fibrosis but no evidence of disease (SUR, 1.6; range, 0.6-2.4). The sensitivity for detecting recurrent tumor (SUR > 2.5) was 97.1%, and specificity was 100%. The SUR for recurrent tumor was statistically significantly higher than for fibrosis (P = .0001).
  
  
  CONCLUSIONS
  FDG PET accurately helps differentiate recurrent bronchogenic carcinoma from fibrosis.
authors.affiliation: Department of Radiology, Duke University Medical Center, Durham, NC 27710.
authors.forename: E F
authors.initials: EF
authors.lastname: Patz
authors.forename: V J
authors.initials: VJ
authors.lastname: Lowe
authors.forename: J M
authors.initials: JM
authors.lastname: Hoffman
authors.forename: S S
authors.initials: SS
authors.lastname: Paine
authors.forename: L K
authors.initials: LK
authors.lastname: Harris
authors.forename: P C
authors.initials: PC
authors.lastname: Goodman
mesh_terms: D002283:Carcinoma, Bronchogenic / Q000000981:diagnostic imaging*; D003847:Deoxyglucose / Q000031:analogs & derivatives*; D003937:Diagnosis, Differential; D005260:Female; D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging*; D011658:Pulmonary Fibrosis / Q000000981:diagnostic imaging; D012680:Sensitivity and Specificity; D014055:Tomography, Emission-Computed
chemical_list: D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18; D003847:Deoxyglucose