New York Times article, Autism’s Unexpected Link to Cancer Genes
"Dr. Charis Eng, a cancer geneticist at the Cleveland Clinic, first noticed a surprising incidence of autism in children whose parents had the PTEN mutation (pronounced p-10). Eventually, investigators discovered that the rate of autism was 10 percent, about 10 times what would normally be expected.
"At the same time, researchers found that another genetic disorder was even more likely to result in autism. That disorder, tuberous sclerosis, increases the risk for kidney cancer and a type of brain cancer; half of tuberous sclerosis patients had autism "
(Gina Kolata, 8/11/2013)