Neoadjuvant treatment:

cT1-2N0 or cT3N0; 5 mm or less extramural invasion; distance to Mesorectal fascia > 1 mm: No neoadjuvant treatment

cT1-3N1 or cT3N0; more than 5 mm extramural invasion; distance to Mesorectal fascia > 1 mm: 5x5Gy pre-operative radiotherapy\

cT4 or cT3; distance to Mesorectal fascia 1 mm or less and/or cN2/extramesorectal lymfnodes: Chemoradiotherapy