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ACR criteria scoring system for diagnosis of GCA [5].
| ACR criteria | Points |
|---|---|
| Age over 50 years | 1 |
| Erythrocyte sedimentation rate (ESR) > 50 mm/h | 1 |
| Superficial temporal artery tenderness | 1 |
| Temporal (lateralised) headache | 1 |
| Positive histology of a temporal artery biopsy | 1 |
