Table 1 : Immunopathological classification of RPGN (modified after Szczepiorkowski
et al., [4,6]).

	RPGN type	Frequency (%)
I	RPGN with linear deposition of IgG due to autoantibodies to type IV collagen representing anti-glomerular  basement GN (anti-GBM)	15
	1. Goodpasture syndrome 2. Idiopathic anti-GBM nephritis 3. Membranous nephropathy mostly associated with  PLA2R antibodies
II	RPGN with granular deposits of immune-complexes	24
	1. Post-infectious Post streptococcal GN Abscesses Bacterial endocarditis 2. Non-infectious Systemic lupus erythematosus Schönlein-Henoch purpura Cryoglobulinemia Wegner´s granulomatosis Polyarteriitis other forms of vasculitis Solid tumors 3. Primary renal diseases IgG – IgA – nephritis Membranoproliferative GN Idiopathic immune complex nephritis
III	RPGN with or without minimal glomerular deposition (ANCA ab): Pauci-immune Glomerulonephritis	60
	1. Microscopic vasculitis 2. Wegner´s granulomatosis 3. Polyarthritis nodosa