Fourth Nerve Paresis and Ipsilateral Horner's Syndrome: An Unusual Association.

Presence of a fourth nerve palsy and ipsilateral Horner's Syndrome (HS) is an exceptional association. A case of a 54 year-old patient with diplopia due to a fourth nerve palsy and acquired HS on the same is presented along with magnetic resonance images (MRI) revealing a mass in the right cavernous sinus. This new combination of ipsilateral signs is analyzed.