1. 1 SCOPE OF BOOK n explosion of novel findings in the past decade has contrib A uted to the great progress toward understanding the biology of human cancers. Much of this progress can be attributed to our abil ity to dissect many biological processes at the molecular level. Most spectacular is the technology of molecular biology that allows identi fication and characterization of genes that participate in the genesis of human cancers. Three major groups of genes appear to play out the drama of cancer development: tumor suppressor genes, mis match repair genes, and oncogenes. The tumor...