Around 300 different diseases that develop from disordered regulatory mechanisms of growth, maturation, division and death of cells are summarized under the concept of „cancer“. With increasing age, cell growth and death progressively disbalance, which increases the risk to fall ill of cancer at an older age. In Germany, about two thirds of all new cases were over 65 years old in 2008.Source: Krebs in Deutschland 2007/2008, 8. Ausgabe, Robert Koch-Institut [Hrsg,], 2012
More info here