A video demonstration of three‐dimensional imaging to assess the circumferential resection margin in locally advanced rectal cancer and recurrent rectal cancer – a video vignette

Surgical treatment of locally advanced primary rectal cancer and locally recurrent rectal cancer often requires extensive approaches to achieve tumor-free resection margins (R0). Magnetic resonance imaging (MRI) is considered the gold standard to assess CRM preoperatively, with 94% negative predictive value for CRM not threatened by the tumor.