Definitions of terms used for classification.
| Classification | Description |
|---|---|
| Healed arteritis | Fibrosis, attenuation and/or neovascularization of the media, irregular intimal proliferation, multifocal to complete loss of internal elastic lamina, adventitial fibrosis. Absence of ongoing chronic medial inflammation |
| Atherosclerotic or age-related changes | Regular intimal proliferation with elastosis, focal loss of the internal elastic lamina, Monkeberg’s calcification. |
| No significant medial pathology | |
| Active arteritis | Ongoing inflammation of the media |
| Normal | No significant pathology |