RT Book, Section A1 Bissonnette, Bruno A1 Luginbuehl, Igor A1 Engelhardt, Thomas SR Print(0) ID 1164072171 T1 Harlequin Syndrome T2 Syndromes: Rapid Recognition and Perioperative Implications, 2e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781259861789 LK accesspediatrics.mhmedical.com/content.aspx?aid=1164072171 RD 2024/04/24 AB Harlequin Syndrome is a condition characterized by asymmetric sweating and flushing on the upper thoracic region of the chest, the neck, and the face. It is usually associated with an injury sustained to the sympathetic nervous system. It can also be the result of a unilateral endoscopic thoracic sympathectomy (ETS) or endoscopic sympathetic blockade (ESB) caused by surgery. This medical condition may also feature dermatological alteration leading to scales development (“fish skin disease”). Horner Syndrome, another problem associated with lesions to the sympathetic nervous system, is often seen in conjunction with Harlequin Syndrome. Associated with a very poor prognosis in which infants die usually younger than 1 week of age.