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Feasible, safe to limit radiation to major salivary glands in head and neck cancer patients
Date:2/20/2014

Scottsdale, Ariz., February 20, 2014Avoiding the contralateral submandibular gland during radiation therapy is feasible and safe with advanced stage, node positive head and neck cancers and base of tongue lesions, according to research presented today at the 2014 Multidisciplinary Head and Neck Cancer Symposium.

Researchers conducted a retrospective analysis of 71 patients from two facilitiesthe University of Colorado Cancer Center and the Memorial Sloan-Kettering Cancer Center. The median patient age was 55, and about 50 percent of the patients were current or former smokers. Forty patients had primary tonsil cancers, and 31 patients had tumors involving the base of the tongue. About 80 percent of patients had N2b or greater disease (meaning extensive lymph node involvement), and 90 percent of patients had overall stage IV disease (indicating advanced cancer). The analysis only included patients who were receiving treatment to the bilateral neck.

All of the patients had been treated with radiation techniques that spared the contralateral submandibular gland (cSMG), which indicates it was on the opposite side of the neck as the cancer. Submandibular glands are major salivary glands located beneath the floor of the mouth and are responsible for the majority of unstimulated salivary flow. The mean dose to the cSMG was 33.04 Gy, and at a median follow-up of 27.3 months, no patients had experienced recurrences in the contralateral level Ib lymph nodes (the area of the spared submandibular gland).

"Sparing the submandibular gland from radiation can decrease the side effect of dry mouth, which has a substantial impact on patients' quality of life," said Tyler Robin, PhD, lead author of the study and an MD candidate in his final year at the University of Colorado School of Medicine. "Historically, however, there has been hesitation to spare the submandibular gland from radiation because there are lymph nodes near the gland that also end up n
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Contact: Michelle Kirkwood
michellek@astro.org
703-286-1600
American Society for Radiation Oncology
Source:Eurekalert

Page: 1 2

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