Abstract
This report provides an overview of the use of radiotherapy for biliary tract cancer. Radiotherapy for biliary tract cancer is mainly categorized as adjuvant therapy for resected cases or as therapy intended to achieve local control or symptom palliation for unresectable cases. Due to the lack of randomized controlled trials, the role of radiotherapy in the treatment of biliary tract cancer has not been fully established. However, based on the data from many retrospective studies, chemoradiotherapy can be considered one of the standard treatment options for patients with a positive surgical margin or unresectable biliary tract cancer under the present circumstances. There are many issues regarding radiotherapy for biliary tract cancer that should be examined, such as the role of brachytherapy and the application of new technologies such as intensity-modulated radiation therapy, and thus well-designed clinical trials are needed in this field.
