Young-Onset Colorectal Cancer

Inclusion Criteria: * PATIENTS: MDACC patients who have adenocarcinoma of the colon or rectum, diagnosed between ages 18 through 50 (young-onset), or diagnosed at age 51 through 80 (later-onset) * PATIENTS: Patient must have sufficient command of the English language and mental capacity to provide consent * FAMILY MEMBERS: Be a parent, sibling or child (first degree blood relative) of a registered MDACC patient meeting eligibility criteria above * FAMILY MEMBERS: Have sufficient command of the English language and mental capacity to provide consent * FAMILY MEMBERS: Family member must be at least 18 years of age at the time of study registration