Hemicrania continua: functional imaging and clinical features with diagnostic implications

Area of Science:

• Neurology
• Neuroscience
• Headache Medicine

Background:

• Hemicrania continua (HC) is a complex headache disorder.
• Current diagnostic criteria may not fully capture its clinical spectrum.

Purpose of the Study:

• To review pivotal research enhancing the understanding of HC pathophysiology and clinical presentation.
• To advocate for revised diagnostic criteria for hemicrania continua.

Main Methods:

• Analysis of a functional imaging study identifying active brain regions during HC attacks.
• Review of a prospective cohort study detailing clinical features of HC patients.

Main Results:

• Functional imaging implicated the dorsal rostral pons and posterior hypothalamus in HC.
• Clinical review revealed a broader range of autonomic signs, frequent migrainous features, and restlessness during attacks.
• Observed significant variability in exacerbation characteristics and pain presentation, including side-switching pain.

Conclusions:

• The dorsal rostral pons and posterior hypothalamus are key in HC pathophysiology.
• Existing diagnostic criteria for hemicrania continua require modification to include a wider array of clinical features.
• Revised criteria will improve the identification and management of patients with HC.