UNASSIGNED: Angiographically occult @entity2457 (AOVMs) are usually found in the supratentorial brain parenchyma. Uncommonly, AOVMs can be found within the cavernous sinus or basal cisterns and can be associated with cranial nerves. AOVMs involving the intracranial segment of the spinal accessory nerve have not been described. A 46-year-old female @entity1 presented with a history of @entity10 and episodes of @entity390 and dizziness, as well as gait instability progressing over 6 months prior to evaluation. Imaging revealed a well-circumscribed 3-cm extraaxial T1-weighted isointense and T2-weighted hyperintense contrast-enhancing mass centered in the region of the right lateral cerebellomedullary cistern. The @entity1 underwent resection of the lesion. Although the intraoperative appearance was suggestive of a cavernous @entity600 , some histological findings were atypical, leading to the final diagnosis of @entity1462 , not otherwise specified. The @entity1 's postoperative course was uneventful with complete resolution of symptoms. To the authors' knowledge, this is the first report of an AOVM involving the intracranial portion of the accessory nerve. For any AOVM located within the cerebellomedullary cistern or one suspected of involving a cranial nerve, the authors recommend including immunohistochemistry with primary antibody to neurofilament in the histopathology workup.

XXXX of the intracranial accessory nerve: case report.

@entity1 :: ('9606', 'Species') :: ['patient'] @entity390 :: ('MESH:D009325', 'Disease') :: ['nausea'] @entity600 :: ('MESH:D000014', 'Disease') :: ['malformation'] @entity2457 :: ('MESH:D020785', 'Disease') :: ['cerebral vascular malformations'] @entity10 :: ('MESH:D006261', 'Disease') :: ['episodic frontal headaches'] @entity1462 :: ('MESH:D054079', 'Disease') :: ['vascular malformation']
@entity1462 :: (MESH:D054079,Disease) :: ['Angiographically occult vascular malformation']
