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===Microscopic=== | ===Microscopic=== | ||
Features: | Features: | ||
*Vasculitis: | |||
*#Inflammatory cells within the vessel wall. | |||
*#Vessel wall injury. | |||
*#*[[Fibrinoid necrosis]]. | |||
*Granulomas typically poorly formed.<ref name=Ref_PBoD747>{{Ref PBoD|747}}</ref> | *Granulomas typically poorly formed.<ref name=Ref_PBoD747>{{Ref PBoD|747}}</ref> | ||
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