Methylated Septin 9 as a prognostic factor in colorectal cancer

Interventions: Group 1: Determination of septin9 methylation status is done in all patientens preoperative. Those with positive methylation-status are assigned to arm 1.
Group 2: Determination of septin9 methylation status is done in all patientens preoperative. Those with negative methylation-status are assigned to arm 2.
Primary outcome of the trial is overallsurvival. It will be determined separately for arm 1 with positive methylation-status at septin9 gene and arm 2 with negative methylation-status at septin9 gene.
This survey will be done once a year routinely according to requirements of DKG-certified Darmzentrum. It will be done orally via a questionform and data will be stored at DKG-certified database kolorect.
Study Design: Allocation: ; Masking: ; Control: ; Assignment: ; Study design purpose: Prognosis