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  • Title: Temporal patterns of head and neck squamous cell carcinoma recurrence with positron-emission tomography/computed tomography monitoring.
    Author: Beswick DM, Gooding WE, Johnson JT, Branstetter BF.
    Journal: Laryngoscope; 2012 Jul; 122(7):1512-7. PubMed ID: 22685038.
    Abstract:
    OBJECTIVES/HYPOTHESIS: To estimate the distribution of head and neck squamous cell carcinoma (HNSCC) recurrence after definitive chemoradiation therapy (CRT) among patients who underwent 18F-fluorodeoxyglucose positron-emission tomography and computed tomography (PET/CT) surveillance. STUDY DESIGN: Retrospective review. METHODS: HNSCC patients who underwent definitive CRT from 2001 to 2008 were evaluated for recurrence with serial PET/CT. Patients were excluded if they were previously treated for recurrent disease, were treated with surgery as the primary therapeutic modality, or had inadequate clinical follow-up. Recurrence was defined by histopathologic evidence of tumor. RESULTS: Three hundred eighty-eight patients were studied. Patients in whom recurrence was not detected were followed clinically and radiographically for a median of 27 months. Tumor recurrence was detected in 110 patients. For 37 patients, recurrence was heralded by clinical signs. Among the 73 asymptomatic patients who had a confirmed recurrence, disease was detected by PET/CT between 2 and 43 months, median of 6 months. Forty-five percent of observed asymptomatic recurrences were detected during the first 6 months of surveillance (95% confidence interval [CI], 34%-57%), 79% within the first 12 months (95% CI, 68%-88%), 95% within the first 24 months (95% CI, 87%-98%), and 100% within the first 48 months (95% CI, 95%-100%). CONCLUSIONS: Among HNSCC patients followed with PET/CT surveillance, 95% of observed asymptomatic recurrences were detected within 24 months after completing CRT. For patients without clinical signs of recurrence, routine PET/CT surveillance beyond the first 24 months may be of limited value and may not be cost effective.
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