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Table 1 The International Study of Kidney Disease in Children (ISKDC) classification of Henoch-Schönlein purpura nephritis (a modification according to ref. [16])

From: Different histological classifications for Henoch-Schönlein purpura nephritis: which one should be used?

ISKDC grade Description
Grade I Minimal alterations
Grade II Mesangial proliferation
Grade III Proliferation or sclerosis with < 50% crescents ((a) focal or (b) diffuse)
Grade IV Mesangial proliferation or sclerosis with 50–75%, crescents ((a) focal or (b) diffuse)
Grade V Mesangial proliferation or sclerosis with > 75% crescents ((a) focal or (b) diffuse)
Grade VI Membranoproliferative like glomerulonephritis