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Harlequin syndrome - Revision history
2026-05-19T08:28:07Z
Revision history for this page on the wiki
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https://idwiki.org/index.php?title=Harlequin_syndrome&diff=9591&oldid=prev
Aidan: Created page with "== Background == * Rare dysautonomic syndrome * Caused by unilateral injury of sympathetic nerves * Often idiopathic, but may be caused by cervical or upper thoracic diseases === Etiologies === * Primary/idiopathic (Harlequin syndrome) * Secondary (Harlequin sign) ** Structural lesions: pancoast tumour, cervical sympathitic tumour, cervical carotid artery dissection, birth injury, thoracic syrinx, medullary infarction, thalamic hemorrhage ** Post-anaesthesia:..."
2022-11-06T13:32:42Z
<p>Created page with "== Background == * Rare dysautonomic syndrome * Caused by unilateral injury of sympathetic nerves * Often idiopathic, but may be caused by cervical or upper thoracic diseases === Etiologies === * Primary/idiopathic (Harlequin syndrome) * Secondary (Harlequin sign) ** Structural lesions: <a href="/index.php?title=Pancoast_tumour&action=edit&redlink=1" class="new" title="Pancoast tumour (page does not exist)">pancoast tumour</a>, cervical sympathitic tumour, cervical <a href="/index.php?title=Carotid_artery_dissection&action=edit&redlink=1" class="new" title="Carotid artery dissection (page does not exist)">carotid artery dissection</a>, birth injury, thoracic syrinx, medullary infarction, thalamic hemorrhage ** Post-anaesthesia:..."</p>
<p><b>New page</b></p><div>== Background ==<br />
<br />
* Rare dysautonomic syndrome<br />
* Caused by unilateral injury of sympathetic nerves<br />
* Often idiopathic, but may be caused by cervical or upper thoracic diseases<br />
<br />
=== Etiologies ===<br />
<br />
* Primary/idiopathic (Harlequin syndrome)<br />
* Secondary (Harlequin sign)<br />
** Structural lesions: [[pancoast tumour]], cervical sympathitic tumour, cervical [[carotid artery dissection]], birth injury, thoracic syrinx, medullary infarction, thalamic hemorrhage<br />
** Post-anaesthesia: thoracic epidural, paravertebral block, multilevel intercostal bnerve block, interscalene block, erector spinae plan block, central line of jugular vein<br />
** Post-surgery: [[carotid endarterectomy]], [[thyroidectomy]], anterior cervical discectomy, excision of neck schwannoma, rotational spine surgery, ECMO line insertion, thoracic sympathetcomy, excision of cervical or mediastinal mass<br />
* Harlequin syndrome of neonates<br />
<br />
== Clinical Manifestations ==<br />
<br />
* Hemifacial discolouration that is sharply demarcated at the midline<br />
** The affected side is pale, cold, and anhidrotic<br />
* May be triggered by exercise, strong emotions, spicy food, and heat<br />
* Lasts minutes to hours, then self-resolves<br />
<br />
[[Category:Neurology]]</div>
Aidan