- Chronic Interstitial Fibrosis and Tubular Atrophy
Interstitial fibrosis is considered to be present when the supporting
connective tissue in the renal parenchyma exceeds 5% of the cortical area.
Tubular atrophy refers to the presence of tubules with thick redundant
basement membranes, or a reduction of greater than 50% in tubular diameter
compared to sorrounding non-atrophic tubules.
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