Dr. Sidharth Ghosh

Trigeminal schwannoma

Trigeminal schwannoma primarily arises in the gasserian ganglion. It comprises only 0.2% to 0.4% of all intracranial tumors.

 

Tumors of the trigeminal nerve most often clinically present with facial pain, usually described as burning in nature. Sensory paresthesias and a diminished corneal reflex also may be seen.

Complete surgical resection is often not possible because of the location and extensive nature of the lesion. Radiation therapy has shown varying results but often is the only therapeutic option because of the location of malignant schwannoma of the trigeminal nerve.

 

Chemotherapy seems to have a very limited role in the management of this tumor.

 

Case – 1
This 44 year old gentleman diagnosed to have right sided trigerminal schwannoma Type C,and all preoperative evaluation was done.

 

Surgery : Right combined subtemporal & transpetrous (transcochlear) approach and total excision of the tumour.

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Axial plane MRI showing Trigeminal schwannoma.
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Coronal plane MRI showing Trigeminal schwannoma.
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Postoperative CT scan.
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Postoperative CT scan.