14 Aug 2014 --- A higher body mass index (BMI) increases the risk of developing 10 of the most common cancers [1], the largest study of its kind on BMI and cancer, involving more than 5 million adults in the UK, published in The Lancet shows. UK researchers at the London School of Hygiene &Tropical Medicine and the Farr Institute of Health Informatics estimate that over 12 000 cases of these 10 cancers each year are attributable to being overweight or obese, and calculate that if average BMI in the population continues to increase, there could be over 3500 extra cancers every year as a result.