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Suggestion of Optimal Radiation Fields in Rectal Cancer Patients after Surgical Resection for the Development of the Patterns of Care Study  

Kim, Jong-Hoon (University of Ulsan Medical College)
Park, Jin-Hong (University of Ulsan Medical College)
Kim, Dae-Yong (National Cancer Center)
Kim, Woo-Cheol (Inha University Medical College)
Seong, JinSil (Yonsei University Medical College)
Ahn, Yong-Chan (Seong Kyun Kwan University)
Ryu, Mi-Ryeong (Catholic University Medical College)
Chun, Mison (Ajou University Medical College)
Hong, Seong-Eon (Kyung Hee University Medical College)
Oh, Do-Hoon (Hallym University Medical College)
Kim, Il-Han (Seoul National University Medical College)
Publication Information
Radiation Oncology Journal / v.21, no.3, 2003 , pp. 183-191 More about this Journal
Abstract
Purpose: To suggest the optimal radiation fields after a surgical resection based on a nationwide survey on the principles of radiotherapy for rectal cancer in the Korean Patterns on Care Study. Materials and method: A consensus committee, composed of radiation oncologists from 18 hospitals in Seoul Metropolitan area, developed a survey format to analyze radiation oncologist's treatment principles for rectal cancer after a surgical resection. The survey format included 19 questions on the principles of defining field margins, and was sent to the radiation oncologists in charge of gastrointestinal malignancies in all korean hospitals (48 hospitals). Thirty three ($69\%$) oncologists replied. On the basis of the replies and literature review, the committee developed guidelines for the optimal radiation fields nor rectal cancer Results: The following guidelines were developed: superior border between the lower tip on the L5 vertebral body and upper sacroiliac joint; inferior border $2\~3$ cm distal to the anastomosis in patient whose sphincter was saved, and $2\~3$ cm distal to the perineal scar In patients whose anal sphincter was sacrificed; anterior margin at the posterior lip of the symphysis pubis or $2\~3$ cm anterior to the vertebral body, to include the internal iliac lymph node and posterior margin $1.5\~2$ cm posterior to the anterior surface of the surface, to include the presacral space with enough margin. Comparison with the guidelines, the replies on the superior margin coincided in 23 cases ($70\%$), the inferior margin after sphincter saving surgery in 13 ($39\%$), the inferior margin after adbominoperineal resection in 32 ($97\%$), the lateral margin in 32 ($97\%$), the posterior margins in 32 ($97\%$) and the anterior margin in 16 ($45\%$). Conclusion: These recommendations should be tailored to each patient according to the clinical characteristics such as tumor location, pathological and operative findings, for the optimal treatment. The adequacy of these guidelines should be proved be following the Korean Patterns of Care Study.
Keywords
Rectal cancer; Radiotherapy; Radiation field;
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