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Syndrome reference sheet
Generated 12 Oct 2026
Neurology · Neurology / Autonomic disorders Pourfour du Petit syndrome
Also known as: Reverse Horner syndrome
Mydriasis, eyelid retraction and hyperhidrosis from sympathetic irritation.
- Medical specialty
- Neurology
- Subspecialty
- Neurology / Autonomic disorders
- Sex & age distribution
- Male: affected; Female: affected; Children: rare
- Gene(s) involved
- None recorded
Etiology & mechanism
Irritative lesion of the cervical sympathetic chain.
Gene(s) involved (0)
No gene recorded.
Symptoms & signs (4)
exophthalmoseyelid retractionhyperhidrosismydriasis