Table 2.

Histological partial scoring, with each compartment (glomeruli, tubules, interstitium) evaluated separately

Partial score	Pathological changes
1	Glomeruli: mild deposition of PTAH-positive eosinophilic material (fibrin) and reduced number of capillaries in a few glomeruli.
	Tubules: <10 % of cortical tubules collapsed or degenerated.
	Interstitium: few small mononuclear cell infiltrates and/or minimal fibrosis in the cortex.
2	Glomeruli: mild/moderate fibrin deposition and reduced number of capillaries in numerous glomeruli.
	Tubules: 10–25 % of cortical tubules collapsed or degenerated.
	Interstitium: multifocal small mononuclear cell infiltrates and/or mild fibrosis in the cortex.
3	Glomeruli: marked fibrin deposition and reduced number of capillaries in numerous glomeruli.
	Tubules: 25–50 % of cortical tubules collapsed or degenerated.
	Interstitium: multifocal larger mononuclear cell infiltrates and/or moderate fibrosis in the cortex.
4	Glomeruli: marked fibrin deposition and reduced number of capillaries in numerous glomeruli; glomerulosclerosis in a few to several glomeruli.
	Tubules: 50–75 % of cortical tubules collapsed or degenerated; numerous dilated tubules.
	Interstitium: multifocal larger mononuclear cell infiltrates and/or moderate fibrosis in the cortex and medulla; mild/moderate parenchymal collapse.
5	Glomeruli: majority of glomeruli sclerotic.
	Tubules: >75 % of cortical tubules collapsed or degenerated; numerous dilated tubules.
	Interstitium: severe parenchymal collapse, affecting cortex and medulla.