A Comparative Study Between Early Onset Colorectal Cancer and Late Onset Colorectal Cancer Patients

Inclusion Criteria: * Patients aged more than 18 years old at the time of inclusion. * Patients with a proven diagnosis of colorectal adenocarcinoma, as reported by the staging histological biopsies. * Patients with a preoperative staging I-III. * Patients scheduled for elective curative colorectal resection. * Patients with rectal cancer who underwent neoadjuvant therapy can be included in the study. * Patients able and willing to comply with the protocol requirements (samples' collection and questionnaires' compilation). Exclusion Criteria: * Patients with metastatic disease at diagnosis. * Patients requiring an emergent procedure. * Patients undergoing palliative surgery (for example, fecal diversion). * Patients with a surgical indication for benign lesions (for example, adenoma or dysplasia). * Patients with an intraoperative finding of a lesion other than adenocarcinoma will be withdrawn from the study. * Patients with an intraoperative finding of distal metastasis or peritoneal carcinosis will be withdrawn from the study. * Patients with a concomitant diagnosis of Inflammatory Bowel Disease. * Patients with a known genetic syndrome (for example, Lynch syndrome or Familial Adenomatous Polyposis).