 This study investigated the relationship between immunostaining patterns and morphologic features of IgN. Immunostaining scores of IgA, IgM, and IgG were found to be significantly associated with certain morphologic features such as endocapillary proliferation and segmental glomerulosclerosis. Additionally, C3 deposits were found to have a significant correlation with serum creatinine levels. This article was authored by Hamid Nasri, Shahram Sajidia, Saeed Mardani, and others.