Acute unilateral poliosis concurrent with trigeminal autonomic cephalalgia: a possible aetiological association.

We report a 24-year-old man who presented with the sudden onset of unilateral poliosis associated with acute trigeminal autonomic cephalalgia, suggesting a pathophysiology in common and a possible neural hypothesis in the development of segmental vitiligo. Although rare, associations with neurological abnormalities should be considered in cases of focal depigmentation disorders.