Vertebral pneumatocysts.

Objective: To review the prevalence and location of vertebral pneumatocysts and evaluate the CT findings of these benign lesions.

Material And Methods: Retrospectively we reviewed CT images of 89 patients with suspected disc disease during a 6-month period.

Results: Distinctive CT pattern of intraosseous pneumatocysts involving the cervical, thoracic and lumbar spine was found. In 8 patients (9%), 10 vertebral pneumatocysts were detected. Five were located in the vertebral body and 4 of these were associated with vacuum phenomenon in adjacent intervertebral discs. Five were located near the facet joint and all were associated with vacuum phenomenon in adjacent facet joint.

Conclusion: Intraosseous pneumatocyst is a benign lesion, therefore biopsy and follow-up are unnecessary. Although vertebral pneumatocysts seem to be uncommon with a few reported cases, this study shows them to be more frequent than previously thought.