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Advances in Radiation Therapy Enable Doctors to Improve the Quality of Treatments for Patients With Head and Neck Cancer
Date:11/13/2009

PALO ALTO, Calif., Nov. 13 /PRNewswire-FirstCall/ -- Clinical studies suggest that advanced treatments like intensity-modulated radiotherapy (IMRT) and image-guided radiotherapy (IGRT) are enabling radiation oncologists to enhance post-treatment health-related quality of life for patients with head and neck cancer.

In an educational session for radiotherapy professionals, delivered by two noted experts during the annual meeting of the American Society for Radiation Oncology (ASTRO) in Chicago last week, Avraham Eisbruch, M.D., professor at the University of Michigan, discussed how careful implementation of IMRT in the treatment of head and neck cancer can achieve high tumor control rates while minimizing xerostomia, a dry mouth condition that occurs when salivary glands are damaged.

Citing a new report summarizing results from RTOG 0022, a multi-institutional study comparing IMRT with earlier forms of treatment for head and neck cancer, Dr. Eisbruch said that IMRT for head and neck cancer achieved important goals in reducing treatment toxicity, notably xerostomia, and in yielding a high tumor control rate of 90%.(1)

For patients enrolled in the study and treated with IMRT, only 55% experienced Grade 2 or worse xerostomia at six months after treatment, as compared with 84% of patients treated with earlier forms of radiotherapy -- a reduction of 35%. For the IMRT group, the percentage of patients with Grade 2 or worse xerostomia decreased steadily, to 25% at 12 months and 16% at 24 months. "This kind of improvement over time is not something we had been seeing with conventional forms of radiotherapy,(2)" said Dr. Eisbruch, who served as chair of RTOG 0022.

"Also, emerging data is suggesting that we can get improvements in broader aspects of post-treatment quality of life by using IMRT, beyond reducing xerostomia," Eisbruch said. "Several studies comparing IMRT with conventional radiotherapy found that the I
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SOURCE Varian Medical Systems, Inc.
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