Abstract
To evaluate the prognostic factors of unknown primary head and neck squamous cell carcinoma (HNSCC). Retrospective study. Patients with unknown primary HNSCC from 1980 to 2000 were included. Forty-eight patients, predominantly male and with a mean age of 63.3+/-11.6 years, were recruited. The median survival time (MST) was 44 months. The overall survival rate was 60.4 percent at three years and 39.6 percent at five years. Forty-two patients receiving intervention regimens had a MST of 45 months, while six patients receiving palliative therapy had a MST of 8.5 months (log rank test, P=0.016). With multivariate Cox regression analysis, age (per year), higher nodal stage (N3 vs N1 or N2), and treatment (operation vs nonoperation) had a hazard ratio of 1.081 (P<0.0001), 5.852 (P=0.010), and 0.4 (P=0.042), respectively. Older age, higher nodal stage, and palliative treatment indicated poor prognosis. Survival time might be prolonged if surgical treatment is tolerable.
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