From the website of the Physicians Committee for Responsible Medicine
The risk of kidney cancer is increased by eating red meat and grilled and pan-fried foods, according to a study published in the American Journal of Clinical Nutrition.
Researchers tracked approximately one-half million men and women in the NIH-AARP Diet and Health Study. Those who ate the most meat, around 4.5 ounces of red meat per day (about the size of an average hamburger), had a higher risk of kidney cancer.
Daniel CR, Cross AJ, Graubard BI, et al. Large prospective investigation of meat intake, related mutagens, and risk of renal cell carcinoma. Am J Clin Nutr. 2012;(1):155-62.