Halo sign is not always due to giant cell arteritis

Key Points

• The research aims to investigate the association of halo sign with conditions beyond giant cell arteritis.
• Conducted a retrospective analysis of imaging data.
• Evaluated patients diagnosed with halo sign.
• Assessed alternative diagnoses and their clinical relevance.
• Identified multiple conditions associated with halo sign.
• Found that a significant percentage of halo sign cases were not due to giant cell arteritis.