Preliminary Evaluation of Septin9 in Patients With Hereditary Colon Cancer Syndromes

Inclusion Criteria: * Informed consent provided * Age \> or = to 18 years of age * Patient group FAP \- Clinical diagnosis of familial adenomatous polyposis * Patient group Lynch syndrome Clinical diagnosis of Lynch syndrome * Patient group MAP \- Clinical diagnosis of MYH-associated polyposis and presence of more than 20 colon polyps * Control group (FAP) \- Genetically related family member of patient * Patients: Able and willing to attend routine follow-up as advised * Controls, i.e. relatives of patients: Willingness to give blood at each routine follow-up as advised for the diseased relative Exclusion Criteria: * Known infection with Human Immunodeficiency Virus (HIV), Hepatitis B Virus (HBV), or Hepatitis C Virus (HCV) * Current diagnosis of colorectal cancer * Pregnancy