Are intravertebral vacuum phenomena benign lesions?

Area of Science:

• Radiology
• Orthopedics
• Oncology

Background:

• Vertebral collapse can result from various conditions, including osteoporosis, infection, metastasis, and multiple myeloma.
• The intravertebral vacuum phenomenon (IVP) is often associated with osteoporotic fractures but its presence in other vertebral collapse etiologies is less understood.
• Differentiating the cause of vertebral collapse is crucial for appropriate patient management.

Observation:

• A retrospective review analyzed plain radiographs of 1282 patients across four groups: osteoporotic vertebral collapse (328), spinal infection (317), spinal metastasis (302), and multiple myeloma (325).
• The occurrence rate of IVP was 18.9% in osteoporotic vertebral collapse, 6.4% in multiple myeloma, and very rare (1 case) in spinal infection.
• IVP was not observed in patients with spinal metastasis.

Findings:

• Intravertebral vacuum phenomena are significantly more prevalent in osteoporotic vertebral collapse compared to spinal infection, metastasis, or multiple myeloma.
• The presence of IVP appears to be a strong indicator of benign osteoporotic fractures.
• The rarity of IVP in infectious and malignant spinal conditions aids in differential diagnosis.

Implications:

• Radiographic identification of IVP can assist clinicians in distinguishing osteoporotic vertebral collapse from other serious causes.
• This finding may reduce the need for further invasive investigations in cases with clear IVP suggestive of osteoporosis.
• Further research could explore the specific mechanisms underlying IVP in different vertebral pathologies.