1. What is the difference between IgA nephropathy and Henoch-Schönlein purpura nephritis? 
Jean-Claude Davin, Ineke J. Ten Berge, Jan J. Weening 
Kidney International 
Volume 59, Issue 3, Pages (March 2001)
DOI: /j x
Copyright © 2001 International Society of Nephrology Terms and Conditions

2. Figure 1
Relationship between initial clinical signs and risk of chronic renal failure in Henoch-Schönlein purpura nephritis (HSPN)25.
Kidney International  , DOI: ( /j x)
Copyright © 2001 International Society of Nephrology Terms and Conditions

3. Figure 2
Immunofluorescence micrograph of a glomerulus from a patient with IgA nephropathy (IgAN) stained for the presence of IgA. A coarsely granular, mesangial staining pattern can be observed (×250).
Kidney International  , DOI: ( /j x)
Copyright © 2001 International Society of Nephrology Terms and Conditions

4. Figure 3
Immunofluorescence micrograph of a glomerulus from a patient with HSP nephropathy stained for the presence of IgA. A granular, partial capillary, partial mesangial staining pattern can be observed (×200).
Kidney International  , DOI: ( /j x)
Copyright © 2001 International Society of Nephrology Terms and Conditions

5. Figure 4
Light micrograph of a glomerulus from the same patient with IgAN as in Figure 2 showing mesangial expansion caused by accumulation of extracellular matrix and hypercellularity. Methenamine silver (×250).
Kidney International  , DOI: ( /j x)
Copyright © 2001 International Society of Nephrology Terms and Conditions

6. Figure 5
Light micrograph of a glomerulus from the same patient with HSP nephropathy as in Figure 3 with influx of neutrophils, fibrinoid necrosis, and intracapillary and extracapillary proliferation, a pattern typical for systemic vasculitis. Methenamine silver (×200).
Kidney International  , DOI: ( /j x)
Copyright © 2001 International Society of Nephrology Terms and Conditions