Renal Transplants from Older Deceased Donors: Use of Preimplantation Biopsy and Differential Allocation to Dual or Single Kidney Transplant according to Histological Score Has No Advantages over Allocation to Single Kidney Transplant by Simple Clinical Indication

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.