High body mass index (BMI) may be to blame for nearly 4% of all cancer cases, a Lancet Oncology study finds. These cancers include colon, rectal, esophageal, ovarian, uterine, and breast. This link seems to be higher among women than men. Highly developed nations had the most high-BMI-related cancers: North America accounted for about a quarter of all such cases.

Lancet Oncology