Even a half-sibling with colon cancer is a high risk factor

Half-siblings of people with colon cancer have nearly the same colon cancer risk as full siblings do — a 6% cumulative lifetime risk compared with 7% — and a higher risk than other second-degree relatives have, researchers recently reported. The risk may be due both to genetics and to shared environmental factors, and the finding

TV watching increases risk of colorectal cancer

A recent study showed that men who watched more than four hours of TV daily had a 35% higher risk of colorectal cancer, compared with those who watched for no more than one hour per day. The study did not find a similar association among women but noted that men with higher levels of physical activity had