Patient with Cluster Headache and Harlequin Sign - Related or Not?

CONCLUSION: This case reports a rare combination of cluster headache and harlequin sign that warrants further testing to exclude pathology in the brain, neck or mediastinum. It also illustrates the underlying anatomy and physiology of the autonomic nervous system. PMID: 32654114 [PubMed - as supplied by publisher]
Source: Headache - Category: Neurology Authors: Tags: Headache Source Type: research