Table 1

Criteria for diagnosis of giant cell arteritis (GCA)

(1)Patients must have symptoms suggestive of GCA and a temporal artery biopsy (performed within 1 week of steroid initiation), with signs of panarteritis including chronic inflammatory cells, disruption of the internal elastic lamina, with or without giant cells, except for (2) or (3).
(2)Patients with acute anterior or posterior ischaemic optic neuropathy with symptoms suggestive of GCA (polymyalgia rheumatica, temporal fossa headache, scalp tenderness, loss of appetite, jaw claudication, tongue claudication, weight loss, night sweats), and ESR >60 mm in the first hour (without other cause for elevated ESR—that is, blood dyscrasia, lymphoma, tuberculosis, renal failure) even if negative temporal artery biopsy.
(3)Patients with symptoms suggestive of GCA and pulseless disease with ESR 60 mm in the first hour