Cervical spine tuberculosis.

Tuberculosis of the cervical spine differs from other vertebral localizations by its extreme rarity, the clinical images are very diversified, the radiological measurements allow a good diagnostic orientation and specifically the MRI which allows a multi-planar study of the various lesions. Only bacteriological evidence can confirm the diagnosis. The treatment is based on a 12-month antituberculosis multidrug therapy and much debate upon the surgical indication.

C1-C2 instability in psoriatic arthritis.

Cervical spine damage is common in psoriatic arthritis especially in older forms and it is rarely initiated by symptomatic atloid-axoid instability. Spinal involvement is frequently associated with sacroiliac dysfunction, the cervical spine involvement is observed in 35%-75% of cases with two types of radiological lesion. Upper cervical spine localization often manifests as C1-C2 arthritis, lower cervical spine involvement is manifested by syndesmophytes, ossification of the anterior longitudinal ligament and posterior inter apophyseal osteoarthritis.