Age

65–any

Sex

ALL

Healthy volunteers

Not accepted

Male and Female participants providing written informed consent aged 75 years and older
PS score ≥1 and /or ASA score ≥3
Macroscopically or pathological colonic adenocarcinoma
Clinical TNM classification T1/T2 N0 M0
Eligible and suitable for CELS resection according to MDT
Tumor must be located in colon, and not involving the ileac valve or taking up more than 50% of the lumen in an air-distended bowel wall

Unable to give informed consent
Histological high-risk features in biopsy material from tumor (mucin, signet cells, de- differentiation)
Suspected other malignancy than adenocarcinoma (e.g. neuroendocrine tumors)
Preoperative chemo/radiotherapy
Creation of stoma perioperative
Non-Danish speakers

The "SPARCOL" Study