The goal of this laboratory research study is to learn more about genetic factors that may influence the risk for developing colorectal cancer at a young age. This study involves participants answering a questionnaire at the beginning of the trial and then again once a year for five years, and providing one blood or saliva sample.
This is an observational study with approximately 1000 participants. It began in June 2012 and is estimated to be completed by June 2023.
- MDACC patients who have adenocarcinoma of the colon or rectum, diagnosed between ages 18 through 50 (young-onset), or diagnosed at age 65 or older (later-onset), who had microsatellite status testing (by either immunohistochemistry or PCR testing or germline testing or a combination thereof).
- Patient must have sufficient command of the English language and mental capacity to provide consent.
Family members who meet the following criteria will be eligible:
- Be a parent, sibling or child (first degree blood relative) of a registered MDACC patient meeting eligibility criteria above.
- Have sufficient command of the English language and mental capacity to provide consent.
- Family member must be at least 18 years of age at the time of study registration.
- Patient must NOT have known or suspected clinical diagnosis of a hereditary polyposis syndrome including hereditary adenomatous polyposis syndromes, hereditary nonadenomatous polyposis syndromes, and hereditary nonpolyposis syndromes.
- Patient’s adenocarcinoma must NOT be microsatellite high or unstable (defined by loss of expression of at least one DNA mismatch repair genes MLH1, MSH2, MSH6, PMS2 by immunohistochemistry, and/or >30% allelic shift by microsatellite PCR testing).
- Patient must NOT have a known germline mutation in DNA mismatch repair genes (MLH1, MSH2, MSH6, PMS2), APC, or MYH genes.
This study is taking place at the University of Texas MD Anderson Cancer Center, Houston, Texas, United States, 77030. For further information please contact Yi-Qian N. You, MD on 713-792-6940 or at YNYou@mdanderson.org.
This study is sponsored by the M.D. Anderson Cancer Center, with Yi-Qian N. You, MD as the Principal Investigator.
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