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M49.5 – Collapsed Vertebra: Causes & Treatment
M49.5 is the ICD-10 code for collapsed vertebra in diseases classified elsewhere. It describes the structural failure of one or more vertebral bodies as a result of an underlying condition.
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M49.5 is the ICD-10 code for collapsed vertebra in diseases classified elsewhere. It describes the structural failure of one or more vertebral bodies as a result of an underlying condition.
What is M49.5?
The ICD-10 code M49.5 refers to collapsed vertebra in diseases classified elsewhere. This code is used when one or more vertebral bodies of the spine structurally fail and collapse, not as a primary disease, but as a consequence of another underlying condition that is coded separately. M49.5 is therefore always assigned together with the code of the causative disorder.
Causes
A vertebral collapse can result from various underlying conditions that compromise the structural integrity of the vertebral bodies:
- Osteoporosis: The most common cause. Reduced bone density makes vertebral bodies fragile, and they may collapse even under minimal load (osteoporotic vertebral fracture).
- Cancer and metastases: Primary bone tumors or metastases (e.g., from breast, prostate, or lung cancer) can destroy the vertebral structure.
- Multiple myeloma: This malignant bone marrow disease frequently leads to vertebral compression fractures.
- Spinal tuberculosis (Pott disease): Infection with Mycobacterium tuberculosis can destroy vertebral bodies.
- Other infections: Bacterial spondylodiscitis (infection of the vertebral body and intervertebral disc) can cause structural collapse.
- Long-term corticosteroid therapy: Prolonged use of corticosteroids significantly reduces bone density and increases fracture risk.
Symptoms
Symptoms depend on the spinal level affected, the extent of the collapse, and the underlying disease. Common symptoms include:
- Sudden, severe back pain (often without a recognizable trauma)
- Pain worsening with movement, standing, or walking
- Loss of body height and development of a rounded back (kyphosis)
- Reduced mobility of the spine
- Nerve root compression with radiating pain into the arms or legs
- In severe cases: spinal cord compression with neurological deficits (numbness, weakness, or paralysis)
Diagnosis
Diagnosis of a vertebral collapse is established through a combination of clinical examination and imaging:
- X-ray of the spine: First-line imaging to detect height loss or deformity of the vertebral body.
- Magnetic resonance imaging (MRI): The gold standard for assessing the extent of collapse, differentiating between acute and chronic fractures, and ruling out malignant causes.
- Computed tomography (CT): Detailed visualization of bone architecture, especially useful for surgical planning.
- Bone density measurement (DXA scan): To assess underlying osteoporosis.
- Laboratory tests and biopsy: When tumor or infection is suspected, to confirm the underlying diagnosis.
Treatment
Treatment is always primarily directed at the underlying cause, while simultaneously addressing the symptoms and instability caused by the vertebral collapse.
Conservative Treatment
- Pain management with analgesics (e.g., non-steroidal anti-inflammatory drugs, opioids for severe pain)
- Short-term rest followed by targeted physiotherapy to strengthen core and back muscles
- Orthopedic aids such as orthoses or back braces for spinal relief
- Treatment of osteoporosis with bisphosphonates, denosumab, or osteoanabolic agents
Minimally Invasive Procedures
- Vertebroplasty: Injection of bone cement into the collapsed vertebral body to reduce pain and provide stabilization.
- Kyphoplasty (balloon kyphoplasty): A balloon is inserted into the vertebral body, inflated to restore height, and then filled with bone cement to stabilize the fracture and relieve pain.
Surgical Treatment
- In cases of neurological deficits or unstable fractures, surgical stabilization (e.g., posterior instrumentation, vertebral body replacement) may be required.
References
- World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10) – M49.5 Collapsed vertebra in diseases classified elsewhere. Geneva, 2019.
- Ensrud KE, Schousboe JT: Vertebral Fractures. New England Journal of Medicine, 2011; 364(17): 1634–1642.
- Vaccaro AR et al.: Spine Trauma – Surgical Techniques. Thieme Verlag, 2021.
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