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What is cancer?

What is the difference between cancerous cells and 'normal' cells?
asked in Biology by kumiori

1 Answer

Cancer cells are mutated 'normal' cells.  Damaged DNA is the difference.  This DNA damage causes normal cells to malfunction and multiply uncontrollably.  If the cancers cell multiplication outruns the immune systems response to damaged cells, the cancerous cells croud out normal cells and block their normal function.  This crowding out creates what we call a tumor.
answered by Robert J