Abstract
Pourfour du Petit syndrome, or reverse Horner syndrome, is described as an overactive sympathetic nervous system, being characterized by mydriasis, eyelid retraction, and hyperhidrosis. We described a case of Pourfour du Petit syndrome after cervical injury by gunshot, with a little review about this rare syndrome. Angiography revealed dissection and formation of pseudo aneurysm of the left carotid artery. We believe that this lesion caused hyper-stimulation of the left cervical sympathetic chain, resulting in reverse Horner syndrome or Pourfour du Petit syndrome. There was reversal of symptoms spontaneously after 3 wk.
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