title: Pseudo-orbital apex syndrome.
abstract: A 48-year-old man had symptoms and signs of the orbital apex syndrome. All orbital and systemic studies were unrevealing . The computed tomoggraphy scan showed a cystic lesion external to the pons. The lesion proved to be a cholesteotoma originating in the peduncular fossa area, comprising the oculomotor nerve proximally and extending anteriorly in a finger-like projection to involve the ipsilateral optic nerve.
mesh_terms: D003390:Cranial Nerve Neoplasms / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D009802:Oculomotor Nerve; D009900:Optic Nerve; D009918:Orbital Neoplasms / Q000175:diagnosis*