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1 3rd Nerve Palsy With Preserved 4th Nerve Function80-yo-woman with a left vasculopathic 3rd nerve palsy (minimal pupil involvement of about 1 mm relative mydriasis OS - other etiologies ruled out and resolved as expected over months). Although the inferior rectus is paretic, intact superior oblique muscle function can be demonstrated by asking the ...Third (Oculomotor) Nerve Palsy; Third subnuclear
2 Aberrant Regeneration of the 3rd NerveAberrant regeneration in two patients: 1) a young woman with a right cavernous sinus meningioma with subsequent development of aberrant regeneration demonstrated by eyelid elevation OD in attempted downgaze (i.e., some fibers that were supposed to innervate the right IR were misrouted to the right l...Third (Oculomotor) Nerve Palsy; Third Aberrant
3 Bilateral INOs and partial 3rd nerve palsiesThis is a 45-year-old man with progressive ptosis and ophthalmoparesis. 10 years prior to presentation, he experienced diplopia and had a hyperintense lesion involving the medial longitudinal fasciculus (MLF) per report. Over time, he developed bilateral adduction paresis, ptosis and upgaze paresis ...Abnormal Range; Third Subnuclear; INO; Mesencephalon
4 Cavernous sinus mass causing right 3rd and 4th nerve palsies25-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 pa...Third (Oculomotor) Nerve Palsy; Third subnuclear; Fourth (Trochlear) Nerve Palsy
5 Sequential vasculopathic 3rd nerve palsies with preserved 4th nerve function65-yo-man with uncontrolled diabetes who developed sequential vasculopathic 3rd nerve palsies. In attempted downgaze, there's clear incyclotorsion OU suggestive of preserved 4th nerve function on both sides. There was complete recovery over months. Video shows bilateral 3rd nerve palsies with intact...Third (Oculomotor) Nerve Palsy; Third subnuclear
6 Traumatic 3rd nerve palsy with aberrant regenerationThis is a 20-yo-woman who experienced severe head trauma and diplopia upon awakening from a coma several weeks after the injury. She had a partial left 3rd nerve palsy (adduction spared), and when she looked to the right and down, her mildly ptotic lid elevated. Aberrant regeneration of CN 3 occurs ...Third Nerve Palsy, , Third Subnuclear Palsy, Aberrant Regeneration
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