| If the erythrocyte sedimentation rate is normal, then GCA is unlikely. | C | 11 |
| Patients older than 50 years with jaw claudication; diplopia; and temporal artery beading, prominence, and tenderness should have a temporal artery biopsy to diagnose GCA. | C | 11,14 |
| Prednisone should be given as first-line therapy for treatment of PMR and GCA. | B | 11,14 |
| Treatment of GCA should not be delayed while awaiting biopsy. | C | 14 |
| Ultrasonography and positron emission tomography are not replacements for temporal artery biopsy. | B | 18–20 |