Abnormal structure of the odontoid process, which is a part of the C2 or axis vertebra and forms pivot of the structures forming the craniovertebral junction. The odontoid process is also known as the dens of the axis.
Comment:
The dens of the axis is a protuberance of the C2 vertebral body around which the first vertebra rotates.
Synonyms:
exact_synonym:
Abnormal odontoid peg; Abnormal odontoid process; Abnormality of the odontoid process