PAS x40 - RCPA

High power examination of H&E stains:• arteries– type (arcuate, interlobular or intralobular) and number– nature of thrombus or embolus– presence and severity of inflammation or necrosis– intimal thickness; if thickened, is there reduplication of elastin?– is the internal elastic lamina intact?– adventitia• arterioles– presence, location and severity of hyalinosis– presence and nature of thrombi• peritubular capillaries– normally inconspicuous, with only sparse leucocytes• veins– inflammation– congestion– thrombosis