Degenerative joint disease is common in the Temporomandibular and other joints such as the cervical vertebrae. This 71-year-old gentleman has a chance finding of a well-defined opacity in the midline in close proximity to the anterior surface of the odontoid process of C2.
This is most likely an osteophyte or calcification of the anterior median ligament. It is of no clinical importance.
Degenerative joint disease is related to age and most people over the age of 50 years have visible signs of degenerative joint disease such as the Osteophyte labeled for C1.
– Dr. Douglas K Benn