The occurrence of colon or rectal cancer in more than one family member may be due to chance alone. However, it could mean that the potential for developing colon or rectal cancer has been passed from one generation of the family to the next generation. This means that relatives of persons with colon or rectal cancer may be more likely to develop it themselves. At this time, genetic testing for families with inherited colon cancer is available. A blood test for the genes that are known to cause colon cancer may be ordered by your doctor.
Genetic testing is offered through research studies as well.
Genetic counseling is strongly recommended for people who may want to have this blood test. Counseling services are available through genetics departments in many hospitals. It is very important to share your family s medical history with your doctor and to discuss it with family members. An Updated Review. The Syndrome, The Genes, and Historical Perspectives.