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J Korean Soc Ther Radiol Oncol > Volume 27(3); 2009 > Article
The Journal of the Korean Society for Therapeutic Radiology and Oncology 2009;27(3): 120-125. doi: https://doi.org/10.3857/jkstro.2009.27.3.120
The Preliminary Results of Intensity-Modulated Radiotherapy for Tonsillar Cancer
Geumju Park, Sang Wook Lee, Eun Kyung Choi, Jong Hoon Kim, Si Yeol Song, Sang Min Youn, Sung Ho Park, Dong Wook Park, Seung Do Ahn
Department of Radiation Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. lsw@amc.seoul.kr
ABSTRACT
PURPOSE:
We wanted to present the preliminary results of intensity-modulated radiotherapy (IMRT) for the treatment of tonsillar cancer.
MATERIALS AND METHODS:
We retrospectively analyzed 12 patients who underwent IMRT for tonsillar cancer at Asan Medical Center between November 2002 and February 2007. Seven patients (58%) received definitive treatment, and five (42%) were treated in the postoperative setting. Among the definitively treated patients, 6 patients received cisplatin-based chemotherapy regimens. Simultaneous modulated accelerated radiation therapy (SMART) was used in nine patients. The prescribed dose was 72 Gy at 2.4 Gy/fraction for the definitively treated cases and 61.6 Gy at 2.2 Gy/fraction for the postoperative cases. The median follow-up period was 34 months.
RESULTS:
All twelve patients completed treatment without interruption, and eleven showed a complete response. One patient had persistent loco-regional disease after treatment. The three-year estimates of loco-regional control, disease-free survival and overall survival were 91.7%, 91.7%, and 100%. The worst acute mucositis was Grade 1 in four patients, Grade 2 in five patients, Grade 3 in two patients and Grade 4 in one patient. Grade 3 xerostomia was observed in six patients.
CONCLUSION:
Intensity-modulated radiotherapy was shown to be a safe and effective treatment modality for tonsillar cancer. Further studies with a larger number of patients and a longer follow-up period are needed to evaluate the ultimate tumor control and late toxicity of IMRT for treating tonsillar cancer.
Key Words: Tonsillar cancer, Intensity-modulated radiotherapy, Radiotherapy
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