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Rheumatology

GCA

Classification

2022 American College of Rheumatology/European Alliance of Associations for Rheumatology classification criteria for giant cell arteritis


Absolute requirement

Age > 50 years at time of diagnosis

Clinical criteria

Morning stiffness in shoulders/neck

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Sudden visual loss

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Jaw or tongue claudication

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New temporal headache

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Scalp tenderness

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Abnormal examination of the temporal artery

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Laboratory and biopsy criteria

Maximum ESR >50mm/hour or maximum CRP >10mg/L

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Positive temporal artery biopsy or halo sign on temporal artery ultrasound

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Bilateral axillary involvement

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FDG-PET activity throughout aorta

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Statistics

Sensitivity: 87%

Specificity: 94.8%

Considerations

The tool is for educational use only, is not meant to be a substitute for professional advice and should not be used for medical diagnosis and/or medical treatment.

  • These classification criteria should be applied to classify the patient as having giant cell arteritis when a diagnosis of medium-vessel or large- vessel vasculitis has been made
  • Alternate diagnoses mimicking vasculitis should be excluded prior to applying the criteria

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