PAS x40 - RCPA

Quantitative criteria for intimal arteritis (v) score:v0no arteritisv1 mild to moderate arteritis in at least one arterialcross sectionv2 severe intimal arteritis with at least 25% luminalarea lost in at least one arterial cross sectionv3 arterial fibrinoid change and/or transmural arteritiswith medial smooth muscle necrosisnote number of arteries present and number affected;indicate infarction and/or interstitial haemorrhage by anasterisk* (with and level ‘v’ score)