Table 9.

Renal corpuscle score.

Quantified Parameter	Score
	0	1	2	3	4
Damage Extent
		Focal Lesions	Diffuse Lesions
Mesangial Changes
Hypercellularity	Absent	Low min 3 cells into one mesangial area	Moderate min 3 cells in 2 mesangial areas	Marked min 3 cells in >2 mesangial areas
Matrix Proliferation	Absent	Low deposits in one mesangial area	Moderate deposits in 2 mesangial areas	Marked deposits in >2 mesangial areas
Fibrinoid Necrosis	Absent	Absent	Absent	Present
Sclerosis	Absent	Absent	Absent	Absent	Present
Glomerular Capillary Changes
	Absent	2–3 inflammatory cells in 2 capillaries	Endocapillary hypercellularity	Capillary necrosis, hyaline trombi	Glomerular collapse
Basement Membrane Changes.
	Absent	“Double contour”	“Wire loops”		Transformation into sclerosis
Segmental Sclerosis
	Absent	Present in <50% of RCs	Present in >50% of RCs	Present in >75% of RCs
Crescent
	Absent	Cellular	Fibro-cellular	Fibrillar
Global Sclerosis
	Absent	Present in <50% of RCs	Present in >50% of RCs	Present in >75% of RCs	Present in 90–100% of RCs