BILATERAL 3RD CRANIAL NERVE PALSY REVEALI NG AN OLIGODENDROGLIOMA

The patient was a 30 year-old man. He had no previous history. For sev eral months he experienced a slowly progressive horizontal diplopia wh ich was the expression of a bilateral third cranial nerve palsy with a n intact intrinsic component, Muscular or neuro-muscular pathology as myasthenia was initially suspected but not confirmed. CT scan and MRI revealed an atypical left temporo-insular lesion which led us to discu ss a chronic inflammatory pathology as sarcoidosis or a tumoral proces s. Finally cerebral biopsy showed a high grade oligodendroglioma. Symp tomatology was attributed to infiltration of the peduncles from this t umor. Such a case has never been seen before, Early neuroradiological explorations would be useful in case of clinical suspicion of cranial nerve palsy.