The transoral approach to clivus and upper cervical region is a direct route for treating pathology ventral to the brainstem and upper cervical spinal cord with low morbidity and mortality rates. This approach may be used for congenital atlanto-axial dislocation, fracture dislocation, vertebrobasilar aneurysms, basilar invagination, compressive rheumatoid pannus and tumours of the craniovertebr...
