Alternative definition : NICHD: A variant of FSGS characterized by scarring of the glomerulus where at least
50% of the scars are adjacent to the hilum and must have hyalinosis; this excludes
cellular, tip and collapsing FSGS. (D'Agati VD, et al. Pathologic Classification of
Focal Segmental Glomerulosclerosis: A Working Proposal. Am J Kidney Dis 43.2 (2004):
368-82.);