Abstract
The efficacy of posttreatment surveillance (18) F-fluorodeoxyglucose positron emission tomography ((18) F-FDG PET)/CT was evaluated in patients with head and neck squamous cell carcinoma (HNSCC). The subjects were 158 patients with HNSCC who underwent PET/CT after definitive treatment. PET/CT detection of subclinical recurrence or a second primary cancer and the effect of timing of PET/CT scans on survival were analyzed. Recurrence or a second primary cancer occurred in 70 patients, and 67% of these cases were detected by PET/CT. Detection rates were 17%, 9%, 5%, and 5% in the first, second, third, and fourth scans at 4, 9, 15, and 21 months, respectively. In multivariate analysis, patients who underwent early first scans had significantly better disease-specific (hazard ratio [HR] = 0.37; p = .031) and overall (HR = 0.45; p = .040) survival compared with those who underwent late first scans. Earlier detection of subclinical lesions by surveillance PET/CT within 4 months after treatment may improve survival in patients with HNSCC. © 2015 Wiley Periodicals, Inc. Head Neck 38: E511-E518, 2016.
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