About Myriad myRisk® Hereditary Cancer testing: The Myriad myRisk® Hereditary Cancer test is a 29-gene panel that identifies an elevated risk for eight hereditary cancers: prostate, breast, ovarian, gastric, colorectal, pancreatic, melanoma, and endometrial. This test analyzes 29 genes that are hereditary (ie: genes that are passed down through your family) and determines if the gene is altered (ie: carries a genetic mutation). If altered, this increases your risk for one or more hereditary cancers. Approximately 5% - 10% of all cancers are hereditary. Individuals with these types of genes are far more likely to develop certain cancers, often at a much earlier age than the general population. For women, Myriad myRisk Hereditary Cancer testing includes "riskScore" that predicts a woman’s five year and lifetime risk for developing breast cancer.