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


José Ramón Sánchez-de la Torre


Service of Neurology, University Hospital "Marqués de Valdecilla" - IDIVAL - University of Cantabria. Santander, Spain. Electronic address: [Email]


The dissection of the internal carotid artery (ICA) is commonly associated with miosis in Bernard-Horner 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.


Cerebrovascular diseases,Internal carotid artery dissection,Mydriasis,Neuroophthalmology,Pourfour du Petit syndrome,