One big difference between osmosis and diffusion is that both solvent and solute particles are free to move in diffusion, but when we talk about osmosis, only the solvent molecules (water molecules) cross the membrane.
Familial Cancer Program. The Familial Cancer Program at Norris Cotton Cancer Center provides counseling for people who may have an increased risk of cancer because of their personal and/or family history. The issues surrounding inherited risk and genetic testing are complicated.
Despite the smaller number of polyps though, individuals with an HNPCC mutation still have a 70-80% lifetime risk to develop colon cancer (as compared to a 100% risk for individuals with FAP). The average age at colon cancer diagnosis is younger in individuals with HNPCC than in the general population.