the transoral approach to the lower third of the clivus and to the ventral aspect of the upper cervical spine is used in craniospinal malformations with or without dislocation as well as in basilar aneurysms , ventrally situated cranio-spinal tumours , fractures of the odontoid process , and in rheumatoid arthritis compressing the spinal cord .
C0037949
spine
C0037930
spinal tumours