XXXX of the cerebellopontine angle in adults.

@entity1 @entity5513 @entity5 @entity1168 @entity797 @entity3085 @entity11 @entity3508 @entity10584 @entity1282 @entity3541 @entity463 @entity4653
@entity11 are rare entities in the cerebellopontine angle (CPA) in adults. The authors present clinical, neuroradiological, serological, and neuropathological findings in a 60-year-old @entity1 with an extraaxial CPA @entity463 arising from the proximal portion of cranial nerve @entity797 . The @entity1 presented with progressive @entity10584 and left-sided @entity3541 lasting less than 2 months and progressive @entity4653 and @entity1282 lasting 2 weeks. Preoperative neuroimaging suggested the diagnosis of @entity5513 with "dural-tail" sign and involvement of the internal auditory canal. Serological examination showed an increase in the malignant markers of ferritin and @entity3508 , which suggested underlying @entity5 . The @entity5 was subtotally removed, and it was confirmed to be completely separated from the brainstem and cerebellum. Cranial nerves VII and @entity797 were destroyed and sacrificed. Transient severe @entity1168 occurred during surgery due to entrapment of the caudal cranial nerve complex by the @entity5 in such an infiltrative way. The neuropathological examination revealed a @entity463 . The @entity1 underwent no further treatment and died of @entity3085 2 months postoperatively. To the authors' knowledge, this represents the first case of a @entity463 in the CPA in an adult. A high index of suspicion along with reliance on clinical assessment, radiological findings, and serum detection of specific malignant markers is essential to diagnose such uncommon CPA lesions.
