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Turkish Journal of Cancer
2008, Volume 38, Number 4, Page(s) 159-166
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Prognostic factors depicting overall survival in lesser major (submandibular, sublingual) and minor salivary gland tumors
RASHMI KOUL1, ARBIND DUBEY1, AZIZ BINAHMED2,3, JAMES BUTLER1, ANDREW COOKE1, AHMED ABDOH4, RICHARD NASON2
1CancerCare Manitoba, Departments of Radiation Oncology, Winnipeg-Canada
2CancerCare Manitoba, Departments of Surgical Oncology, Winnipeg-Canada
3King Abdulaziz Medical City, Department of Surgery, Riyadh-Saudi Arabia
4University of Manitoba, Department of Surgery, Winnipeg-Canada

The purpose of this analysis is to determine the predictors of 5 year overall survival in patients with lesser major (submandibular, sublingual) and minor salivary glands cancer. A historical cohort of 97 patients with submandibular, sublingual and minor salivary glands cancer excluding sinus tumors with a median follow-up of 56.5 months was analyzed. Kaplan-Meier curves and log-rank test were used for subgroup survival analysis. Multivariate models employing Cox's proportional hazard models were used to determine the predictors of 5 year overall survival. The mean age of the cohort was 56 years. The site of involvement was submandibular in 46.39%, sublingual in 8.2% and minor salivary glands in 45.36%. The 5 year overall survival, disease-specific survival and disease-free survival were 65%, 81% and 56%, respectively. 5 year survival was 71% in patients treated with surgery alone, 67% treated with radiation only, 65% with combination of surgery and radiotherapy, and 0% for palliation (p<0.0001). Multivariable Cox's proportional hazard model identified site, age and treatment modality affecting 5 year overall survival. Patients with submandibular gland cancer had a greater risk of dying within the 5 year period as compared to patients with minor salivary glands cancer (HR=3.3; 95% CI=1.4- 7.9; p<0.01). Surgery followed by adjuvant radiation had 75% protective effect on the hazard of death as compared to other treatment modalities (HR=0.25; 95% CI=0.1-0.7; p<0.001). Site, age and treatment modalities are important predictors of survival in small salivary gland cancer. [Turk J Cancer 2008;38(4):159-166]

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