User:AntikytheraMxn/sandbox

Pourfour du Petit Syndrome (PdPs) is a rare cause of unilateral mydriasis, lid retraction, exopthalamos, and hyperhydrosis.

It is typically caused by injuries or tumors that stimulate the cervical sympathetic chain, causing ipsilateral symptoms.

Clinically it can be thought of as the opposite of Horner Syndrome, which causes myosis due to interruption of the sympathetics.

Pourfour du Petit Syndrome has been described in association with XX, YY, ZZ.

It is thought to be much less common than Horner's syndrome because only some lesions are able to stimulate the carotid nerve plexus.

It was described in XXXX by Pourfour du Petit.