Cavernous sinus mass causing right 3rd and 4th nerve palsies

25-yo-man who complained of diplopia and was initially found to have right 4th and 6th nerve palsies in the setting of a right cavernous sinus mass (subsequently diagnosed as Ewing’s sarcoma). When seen in follow-up (this video), there was a new right 3rd nerve palsy, still with a right 4th nerve palsy, and improved 6th nerve palsy. Video shows right 3rd and 4th nerve palsies (very mild 6th nerve palsy too) in the setting of a right cavernous sinus syndrome. In downgaze OD, there is no clear incyclotorsion of the eye, suggesting that the right 4th nerve is involved.