Table 1.

Comparison between the Deauville score for lymphoma and the PETVAS score for large-vessel vasculitis

Deauville Score for Lymphoma	PETVAS for Large-Vessel Vasculitis*
1 no uptake above background	0 no uptake above background
2 uptake ≤ mediastinum	1 uptake ≤ mediastinum
3 uptake > mediastinum but ≤ liver	2 uptake > mediastinum but ≤ liver
4 uptake moderately > liver	3 uptake > liver
5 uptake markedly > liver or new lesions	No similar score
x new areas of uptake unlikely to be related to lymphoma	No similar score

^*PETVAS is scored by determining FDG uptake on a 0–3 scale in nine specific arterial territories: ascending aorta, aortic arch, descending thoracic aorta, abdominal aorta, right and left carotid arteries, right and left subclavian arteries, and the branchiocephalic artery. PETVAS is therefore a summary score that ranges from 0–27. A specific scoring threshold does not define “active disease” because vasculitis can be focal or diffuse in an individual patient.