Idiopathic Harlequin Syndrome in a Patient from Ethiopia: A Case Report.

Background: Harlequin syndrome is a rare disorder caused by autonomic nervous system dysfunction. It manifests as asymmetric facial flashing and sweating with contralateral anhidrosis. It may be primary (idiopathic) with a benign course or can occur secondary to structural abnormalities or iatrogenic factors. To our knowledge, there has been no report of idiopathic Harlequin syndrome published from Ethiopia. We are reporting this case since it signifies the existence of idiopathic Harlequin syndrome in our setting and the need to properly diagnose this condition. Case Presentation: We are reporting a 29-year-old female from Addis Ababa, Ethiopia, who presented with a complaint of left hemifacial hyperhidrosis of 8 years which worsen after routine household activities and exercise. Physical examination revealed left hemifacial hyperhidrosis with right-side anhidrosis. She was diagnosed with idiopathic Harlequin syndrome after an appropriate investigation revealed a nonremarkable finding. Symptomatic treatment showed no significant improvement and the patient was also counseled on the disease entity. Conclusions: The patient described here signifies an idiopathic Harlequin syndrome in an Ethiopian woman. This case highlights the existence of idiopathic Harlequin syndrome within our setting and the need to properly diagnose this condition.