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Text File  |  1999-06-07  |  414 b   |  7 lines
  1. FIGURE 14-1.  Carcinogenesis is  a multistep  process. The  transition
  2. from completely normal to frankly malignant occurs through a series of
  3. mutations  in  genes  that control  cell  growth  and differentiation.
  4. Epigenetic  phenomena, such  as methylation, also  play a  role. Early
  5. "hits"  may have  little apparent  phenotypic  effect, but  ultimately
  6. growth patterns and cellular morphology are altered.
  7.