Dear Sir,In a previous report, 1 we provided information on the relation between acrylamide intake and risk of cancers of the upper aero-digestive tract, colorectum, breast, ovary and prostate, using data from a series of Italian and Swiss case-control studies. No significant association emerged for any of the cancer sites considered, with odds ratios (OR) for the highest level of acrylamide intake ranging between 0.92 for prostate cancer and 1.23 for laryngeal cancer. New data are now available on renal cell cancer (RCC) from an Italian case-control study conducted using the same methods and food frequency questionnaire. To our knowledge, only 2 Swedish case-control studies have provided data on the issue, 2,3 and found no association between acrylamide intake (OR 5 0.8; 95% confidence interval (CI), 0.4-1.7, and OR 5 1.1; 95% CI, 0.7-1.8, for the highest versus lowest quartile) and risk of kidney and RCC, respectively.The general scheme of the study and methods have been described elsewhere. 1,4 Briefly, a case-control study of RCC was conducted between 1992 and 2004 in 4 Italian areas. Cases were 767 patients (494 men, 273 women) with incident, histologically confirmed RCC, recruited in a network of major teaching and general hospitals in the areas under surveillance. Controls were 1,534 subjects (988 men, 546 women), matched with cases by study centre, sex and age, admitted to the same hospitals for acute non-neoplastic conditions, unrelated to known or potential risk factors for RCC nor to long-term modifications of diet.Cases and controls were questioned during their hospital stay by trained interviewers. Information on diet was based on a food frequency questionnaire including 78 foods and recipes, that showed satisfactory validity and reproducibility. 5,6 Among the items in the food frequency questionnaire, those considered for the estimation of acrylamide intake were consumption of fried/ baked potatoes, coffee, ''cappuccino'' (white coffee), bread, pizza, fried meat and fish, sweet biscuits, crackers, breadsticks and melba toast. The mean acrylamide content of each food was obtained from resources made available on the Internet by the World Health Organization (WHO, http://www.who.int/foodsaf ety/chem/en/) and the French Agency for Food Safety (AFSSA, http://www.afssa.fr). 7,8 For those foods that are prepared in a similar way in Italy and France (e.g., bread), we preferred -when available -data from the latter source.We estimated the ORs and the corresponding 95% CI using multiple conditional logistic regression models, conditioned on study centre, sex and quinquennia of age, and adjusted for year of interview, education (<7, 7-11, 12 years), smoking habit (never, ex, current smokers of <15, 15 to < 25, 25 cigarettes per day), alcohol consumption (never, ex, current drinkers of <21, 21 drinks per week), body mass index (<25, 25 to < 30, 30 kg/m 2 ), occupational physical activity (mainly standing/sitting, intermediate, heavy/strenuous), family history of kidney cancer and energy intake (in quintiles)....