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Total neoadjuvant therapy for patients with locally advanced rectal cancer — whereby chemoradiotherapy and chemotherapy are administered prior to surgery — offers the potential for enhanced treatment tolerance and delivery, improvements in pathologic response at surgery, and nonoperative management for colostomy candidates who achieve a clinical complete response. However, for patients with high- or mid-rectal cancers undergoing total mesorectal excision, the role of neoadjuvant radiotherapy has been increasingly questioned.
To test the concept of avoiding neoadjuvant radiotherapy in this setting, investigators conducted a multicenter, noninferiority, randomized, phase 3 trial (PROSPECT) involving 1128 patients with clinical stage T2N1 or T3…