Persistent isolated mydriasis as an early sign of internal carotid artery dissection: Pourfour du petit syndrome

摘要

Background: The dissection of the internal carotid artery (ICA) is commonly associated with miosis in Bernard-Homer syndrome (BHS). The presence of mydriasis is exceptional but can occur in the context of Pourfour du Petit syndrome (PDPS), a rare entity opposite of BHS accompanied by eyelid retraction and hyperhidrosis and caused by hyperactivity of the sympathetic cervical chain. Aim To report on a case of PDPS as the first manifestation of an ICA dissection.