Thoracic Spine

Symptomatic thoracic disks are uncommon, accounting for about 1% of all disk herniations. The rib cage, small intervertebral disks, and coronal orientation of the facets joints all contribute to limited mobility of the thoracic spine, and consequently, a lower risk of disk herniation. The most common level is T11-T12, where the spine is relatively less rigid. Sagittal T2-weighted FSE sequences are excellent for displaying indentation of ventral thecal sac and impingement of the spinal cord by thoracic disks. Axial images help delineate lateralization to either side. Disk morphology is similar to the cervical region. Calcification is more common in thoracic disk fragments and parent disks than in cervical or lumbar region. 

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