These genes are hMSH2 found on chromosome 2, and hMLH1 found on chromosome 3. A blood test has been developed to test selected individuals for these identified genes. It is especially important for those individuals who choose to have genetic testing. Genetic counselors are trained to discuss how genes are inherited, who should undergo genetic testing, the implications of both positive and negative gene tests, medical recommendations based on test results, and other issues related to genetic testing. Most health problems respond best to treatment when they are diagnosed and treated as early as possible.
Treatment is most effective before the disease spreads.
Full colonoscopy every year beginning either at age 25 or when the individual is 5 to 10 years before of earliest cancer diagnosed in the family. For women, annual screening for endometrial cancer, either by endometrial aspirate or transvaginal ultrasound, is recommended beginning at age 25 to 35. However, many early cancers fail to produce symptoms. There are several methods available for examining the colon for the presence of precancerous polyps and cancers. Two tests enable the physician to view the eintire colon from the rectum to the cecum.