[Prevalence of chronic kidney disease in patients infected by the human immunodeficiency virus].

Dear Editor, We thank to Dr Mubarak for his interest in and comment on our article “IgM nephropathy in children: clinicopathologic analysis”. We agree with Dr, Mubarak that IgM nephropathy (IgMN) is a very controversial entity, with variable deinitions in the different case series published. As in all series of glomerulopathy cases, the percentage frequency variability depends largely on the subjectivity of diagnosis in many cases, the characteristics of each study population and the denominator used to determine the percentage. We decided use all renal biopsies because it gives us an idea of the total frequency