| 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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