EGF and focal segmental glomerulosclerosis: Metalloproteinase, growth factors, such as epidermal growth factor (EGF) and transforming growth factor (TGF-β1), a1-antitrypsin, fragments of albumin and Tamm-Horsfall protein and miRNAs are few examples of the molecules whose urinary levels can be important in discriminating FSGS and MCD and also give information about disease outcome (9-13).