Table 3.

Light microscopic findings^a

Pathologic Findings	Value
No. of glomeruli (mean)	17.7
% of globally sclerotic glomeruli (mean)	17.5
Predominant histologic pattern
membranoproliferative GNb	21 (56.8)
endocapillary proliferative GNb	13 (35.1)
mesangial proliferative GN	1 (2.7)
membranous GN	2 (5.4)
Crescentsc	12 (32.4)
focal	10
diffuse	2
Interstitial inflammation: None/focal/diffused	4/28/5 (10.8/75.7/13.5)
Tubular atrophy and interstitial fibrosis: None/mild/moderate/severee	2/25/6/4 (5.4/67.6/16.2/10.8)
Arteriosclerosis and arteriolar hyalinosis: None/mild/moderate/severe	9/16/11/1 (24.3/43.2/29.7/2.7)
Concurrent vascular amyloid	1 (3)

^aGN, glomerulonephritis.

^bWith or without membranous features.

^cFocal, <50% of glomeruli; diffuse, ≥50% of glomeruli.

^dFocal <50% of cortical surface area; diffuse ≥50%.

^eMild, 0 to 25% of cortical surface area; moderate, 26 to 50%; severe, >50%.