It looks like the link between aging and cancer is becoming clearer. There is apparently an intertwined relationship between some forms of cancer and aging which centers around telomeres. This would support the SENS view that there are only a finite number of factors causing aging which are also responsible for disease.
Cancer Links to Aging Painted on Palette by Salk Researchers (Senior Journal)
Feb. 6, 2007 - Wielding a palette of chromosome paints, scientists at the Salk Institute for Biological Studies have taken a step closer to understanding the relationship between aging and cancer by visualizing chromosomes of cells from patients with a heritable premature aging disease known as Werner Syndrome.