Skull base tumor
Skull base tumors are relatively rare.
Schwannomas comprise less than 10% of all primary intracranial tumors. Schwannomas of the vestibular nerve are the most common neoplasms that involve the temporal bone and represent 75% of tumors that occupy the cerebellopontine angle cistern.
Chondrosarcomas comprise approximately 0.1% of all intracranial tumors. Half of these develop at the cranial base.
Chordomas also comprise approximately 0.1% of all intracranial tumors. Forty percent of chordomas develop at the skull base.
Skull base metastases, not including direct extension, occur in 4% of cancer patients.
Types
Anterior cranial fossa
Middle cranial fossa
Posterior cranial fossa tumor
Other skull base conditions
Rathke’s cleft cyst
Cerebrospinal fluid (CSF) leak
Encephaloceles
Fibrous dysplasia