Objective:To explore the best method for detecting immunoglobulin,HBsAg and HBcAg in formalin-fixed paraffin-embedded renal biopsy tissues by immunofluorescence(IF).Methods: In the study,45 cases of renal biopsy were collected,including 20 cases of immunoglobulin A(IgA) nephropathy,15 cases of membranous nephropathy and 10 cases of membranous type hepatitis B virus associated nephritis.IgG,IgA,HBsAg and HBcAg depositions were evaluated in these cases by IF with different antigen retrieval methods and differ...