Minimally Invasive Sphincter Sparing Total Mesorectal Excision for Ultra-low Rectal Cancer After Initial Chemo-radiotherapy (MISS-TRICR).

A prospective study is planned for management of low rectal cancer with the aim of sphincter preservation and improving the oncological outcome of the patients, through comparing of both approaches minimally invasive techniques including transanal total mesorectal excision and laparoscopic intersphincteric resection.