OBESITY is fuelling a major increase in the number of cases of kidney cancers diagnosed in Britain, experts say. Cancer Research UK has published figures showing there were just over 9,000 cases in 2009, compared with just under 2,300 in 1975. Obesity increases kidney cancer risk by about 70%, compared with smoking which increases it by about 50%. Cancer Research UK says too few people understand the cancer risk of being overweight. Kidney cancer is now the eighth most common cancer. Blood in the urine can be an early sign that something is wrong. But kidney cancer, if diagnosed early, can often be cured by surgery. The experts say that being overweight increases the risk of this cancer, as well as others including breast, bowel and womb cancer, because it causes the higher levels of certain hormones to be produced, compared with those seen in healthy people.            –BBC