Ossification of the posterior atlantoaxial membrane and the transverse atlantal ligament.

STUDY DESIGN

Case report.

OBJECTIVE

To report a case of ossification of the posterior atlantoaxial membrane (PAAM) and ossification of the transverse ligament of the atlas (TAL).

SUMMARY OF BACKGROUND DATA

Ossification of the PAAM and TAL are both very rare clinical entities. This is the first case involving ossification of both the PAAM and TAL with the development of cervical myelopathy.

METHODS

Patient's history, physical examination, radiographic evaluation, surgical treatment, and outcome are examined. Relevant literature is also reviewed.

RESULTS

The patient's neurological symptoms significantly improved after posterior decompressive surgery.

CONCLUSION

Ossification of various parts of the spinal ligament have been reported previously. Among them, ossification of both the PAAM and TAL has never been reported previously and is thus extremely rare. Surgical intervention improved the neurological impairment.