Inclusion Criteria:  Patients with either FAP, Lynch syndrome, other HNPCC, sporadic colorectal cancer, ulcerative colitis or other conditions who are scheduled for whole or partial resection of their colon  Exclusion Criteria:  Any condition that makes the investigator or hospital personnel doubt that voluntary participation isfeasible. Patients who are not able to understand and sign the informed consent form for any reason, including lack of a sufficient period of time to consider their participation. Patients who are below 18 years of age. Patients who donated blood to a blood bank within 3 months prior to their operation.