Malignant meningioma of the oculomotor nerve without dural attachment. Case report and review of the literature.
Meningiomas, thought to arise from arachnoid cap cells, are usually attached to the dura. Malignancy is present in approximately 1% of these tumors. The authors report the case of a patient with a malignant meningioma arising from the oculomotor nerve with no dural attachment. The patient presented with a 7-month history of left-sided ptosis and diplopia. Magnetic resonance imaging demonstrated an extrinsic mass compressing the root of the oculomotor nerve at its exit from the midbrain. During surgery, a left-sided subtemporal approach revealed the tumor to be arising from the oculomotor nerve. Histological investigation showed a malignant spindle cell lesion with an immunohistochemical profile that was consistent with malignant meningioma. To the authors' knowledge, this is the first documented case of a malignant meningioma arising from the oculomotor nerve.
Hart
A J
AJ
Gough-Cooper Department of Neurological Surgery, Institute of Neurology, The National Hospital for Neurology and Neurosurgery, London, United Kingdom. Alister.Hart@Virgin.net
Allibone
J
J
Casey
A T
AT
Thomas
D G
DG
D000328:Adult; D001099:Arachnoid / Q000473:pathology; D001763:Blepharoptosis / Q000175:diagnosis; D003390:Cranial Nerve Neoplasms / Q000175:diagnosis* / Q000473:pathology; D004172:Diplopia / Q000175:diagnosis; D004388:Dura Mater / Q000473:pathology; D005260:Female; D005904:Glial Fibrillary Acidic Protein / Q000032:analysis; D006801:Humans; D007150:Immunohistochemistry; D008579:Meningioma / Q000175:diagnosis* / Q000473:pathology; D018396:Mucin-1 / Q000032:analysis; D009802:Oculomotor Nerve / Q000473:pathology*; D010243:Paralysis / Q000175:diagnosis; D009418:S100 Proteins / Q000032:analysis; D014746:Vimentin / Q000032:analysis
D005904:Glial Fibrillary Acidic Protein; D018396:Mucin-1; D009418:S100 Proteins; D014746:Vimentin