Chemoradiotherapy (Perioperative/Concurrent Chemoradiation)

It can be used for neoadjuvant therapy for those with locally advanced disease who are planning surgery, adjuvant therapy for high-risk populations after surgery, or radical or palliative regimens when surgery is not possible/suitable. The decision is based on staging, margin and lymph node status, previous treatment response, overall function and organ reserve, and an assessment of whether concurrent treatment is appropriate.