PAS -- 400X

In the center of this field, there is an arteriole (one smooth muscle layer, flattened endothelial cells) with a considerable amount of bright pink (PAS positive) material in the subendothelium and smooth muscle layers. Within the surrounding interstitium, there are multiple atrophic tubules, interstitial fibrosis, and some inflammation. In the top left corner of the photomicrograph, there is another small artery (two layers of smooth muscle), only the bottom half is visible, and there is similar PAS positive material in the smooth muscle.

Courtesy: Nephrology On-Demand (www.nephrologyondemand.org) (ISSN 2155-9813)

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