Idiopathic Harlequin syndrome.

Harlequin syndrome (HA) is a rare pathology. It is manifested by isolated unilateral facial flushing (less often the face and limb), sometimes with concomitant hyperhidrosis and Horner’s syndrome. In most cases, this is an idiopathic condition with a benign course. However, HA can be a manifestation of serious diseases, as well as a complication of surgical interventions at the cervical and upper thoracic levels. We present clinical case of a female patient with Harlequin syndrome as well as a short review of scientific literature.