Genetics of hereditary colon cancer: a model for prevention.

Accompanying the explosion of genetic information about cancer is the technology to allow a better understanding of carcinogenesis and tools that can be exploited in the diagnosis and management of cancers. The familial forms of colorectal cancer, including familial adenomatous polyposis and hereditary nonpolyposis colorectal cancer offer the most tangible examples of potential improvements in mortality and morbidity incorporating molecular markers. This article reviews the current direct applications of molecular genetics in identifying the risk, prevention and management of colon cancer. The limitations and current controversies in the field are discussed, including research strategies being adopted to solve the remaining problems. Parallel strategies in familial breast cancer and ovarian cancer are being developed to bring the medical profession into the molecular age of cancer management.