Method: A retrospective, case series. Results: From March 2011 to March 2013, we proceeded renal biopsy in 75 patients, in which 43 primary nephrotic syndrome (NS), 1 NS secondary to pulmonary cancer, 4 NS associated with viral hepatitis, 21 lupus nephritis, 2 chronic glomerulonephritis, 4 acute renal failure due to glomerulopathy.