AUTHOR=Roemer Ségolène , Maeder Philippe , Daniel Roy Thomas , Kawasaki Aki 

TITLE=Sixth Nerve Palsy from Cholesterol Granuloma of the Petrous Apex

JOURNAL=Frontiers in Neurology

VOLUME=8

YEAR=2017

URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2017.00048

DOI=10.3389/fneur.2017.00048

ISSN=1664-2295

ABSTRACT=<p>Herein, we report a patient who had an isolated sixth nerve palsy due to a petrous apex cholesterol granuloma. The sixth nerve palsy appeared acutely and then spontaneously resolved over several months, initially suggesting a microvascular origin of the palsy. Subsequent recurrences of the palsy indicated a different pathophysiologic etiology and MRI revealed the lesion at the petrous apex. Surgical resection improved the compressive effect of the lesion at Dorello’s canal and clinical improvement was observed. A relapsing–remitting sixth nerve palsy is an unusual presentation of this rare lesion.</p>