Objectives: Current study was designed to determine the frequency of ANCA (p-ANCA and c-ANCA) in clinically diagnosed glomerulonephritis patients. Study Design: Cross-sectional analytical study. Place and Period of study: Department of Immunology, University of Health Sciences, Lahore in a period of one year. Materials and Methods: The study included 64 glomerulonephritis patients. Methodology: Levels of ANCA (MPO and PR3) were determined by ELISA technique. Results: Four (6.25%) patients showed positive reaction to myeloperoxidase [MPO] antigen while 1 (1.56%) was positive for proteinase-3...