Membranous or membranous-like GN: A case report of massive proteinuria, positive serum with negative PLA2R on biopsy.

This case report represents primary membranous glomerulonephritis (MGN) with positive serum anti-PLA2R antibodies, 2+ positivity for IgG4 on immunofluorescence with routine fresh-frozen sections and negative PLA2R stain on biopsy. He was treated as primary MGN based on positive serum PLA2R and the absence of clinical symptoms or signs suggestive of any secondary MGN.