Table 1.

Histologic score in use for kidney allocation to SKT or DKT of “high-risk” donors.

Glomerular global sclerosis	0: no glomeruli globally sclerosed
	1: less than 20%
	2: 20–50%
	3: >50%
Arteries/arterioles wall thickness ∗	0: normal appearance
	1: less than lumen diameter
	2: equal/slightly higher than lumen diameter
	3: higher than lumen diameter/severe lumen reduction
Tubular atrophy	0: absent
	1: less than 20% tubuli affected
	2: 20–50%
	3: >50%
Interstitial fibrosis	0: absent
	1: less than 20% parenchymal tissue substituted
	2: 20–50% tissue
	3: >50% tissue

^∗The most severe lesion determines the score; the final score is the sum of 4 individual scores; with final score up to 4 (included) organs are allocated to solitary kidney transplantation (SKT); from 5 to 7 (included) organs are allocated to dual kidney transplantation (DKT); higher than 7 organs are discarded.