The emerging genetics of human cancer.

A rapid and exciting accumulation of data about cellular oncogenes in human tumors has resulted from convergent research on DNA-mediated gene transfer, retroviruses, and tumor cytogenetics. Such work promises to increase our understanding of the genetic events that predispose to, and result in, malignant disease. This knowledge may quickly find clinical application in tumor classification and prediction of risk. Ultimately, therapeutic benefits may be achieved as we begin to explore the mechanisms by which transforming gene products act to defeat the normal regulatory processes of cells.