According to a study presented at the European Congress on Obesity in Venice, sponsored by Lund University in Malmo, Sweden, half of all cancer cases are linked to obesity.

Obesity is associated with over half of cancer incidences, according to recent studies.

Over 30 different varieties of the disease may be fueled by excess weight, according to a study that followed over four million persons over decades.

The results, which will be presented at the European Congress on Obesity in...