ACR Appropriateness Criteria Headache.

Area of Science:

• Neurology
• Radiology
• Evidence-Based Medicine

Background:

• Primary headaches are common, but distinguishing them from secondary causes is crucial.
• Neurologic imaging is often overutilized for headache evaluation.
• Identifying "red flags" is key to appropriate diagnostic workup.

Purpose of the Study:

• To provide evidence-based guidelines on the appropriate use of neuroimaging for headache evaluation.
• To outline specific headache characteristics and patient populations that warrant further investigation.
• To inform clinical decision-making regarding neuroimaging in headache management.

Main Methods:

• Review of current medical literature from peer-reviewed journals.
• Application of a modified Delphi consensus methodology by a multidisciplinary expert panel.
• Development of the ACR Appropriateness Criteria for headache imaging.

Main Results:

• Most uncomplicated, nontraumatic primary headaches do not require imaging.
• Imaging is indicated for headaches with specific "red flags" (e.g., trauma, thunderclap onset, positional).
• Certain patient groups (pregnant, immunocompromised, cancer patients) and headache types (e.g., exertional, cough) benefit from neuroimaging.

Conclusions:

• Neuroimaging should be reserved for headaches with concerning features or specific patient risk factors.
• Guidelines help optimize diagnostic strategies, avoiding unnecessary procedures.
• Appropriate imaging selection ensures timely diagnosis of secondary causes while managing primary headache syndromes effectively.