Relationship between silent brain infarction and chronic kidney disease

study, we have not investigated this aspect. Yet we have data on body mass index, a main component of the metabolic syndrome together with insulin resistance. A BMI of 30 or more was present in 20.3% of kidney stone formers with hypertension and in 9.4% of subjects without hypertension. This difference is statistically significant (P < 0.01), but does not exclude the presence of hypertension in subjects with normal BMI. Furthermore, essential hypertension was present in formers of various types of stone, and not only in uric acid stone formers, that are the object of the hypothesis of Afsar et al. In conclusion, the hypothesis put forward by the authors is interesting but deserves a properly designed study to be confirmed.