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M43.2 - Fusion of the Spine (Spondylodesis)
M43.2 is the ICD-10 code for fusion of the spine, also known as spondylodesis. It describes the permanent joining of vertebral bodies due to disease or surgical intervention.
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M43.2 is the ICD-10 code for fusion of the spine, also known as spondylodesis. It describes the permanent joining of vertebral bodies due to disease or surgical intervention.
What is M43.2?
The ICD-10 code M43.2 stands for fusion of the spine, also referred to as spondylodesis or spinal fusion. This term describes the permanent joining of two or more vertebral bodies, eliminating movement between the affected segments. M43.2 is applied both to disease-related fusions and to postoperative states following surgical spinal fusion procedures.
Causes
Spinal fusion can result from several different causes:
- Surgical (operative spondylodesis): Spinal fusion is often intentionally performed as a surgical procedure to treat conditions such as herniated discs, spondylolisthesis (vertebral slippage), scoliosis, or degenerative spinal disease.
- Inflammatory conditions: Chronic inflammatory diseases such as ankylosing spondylitis (Morbus Bechterew) can lead to spontaneous bony fusion of the spine over time.
- Infections: Bacterial infections of the spine (spondylodiscitis) may result in fusion following healing.
- Trauma: Severe spinal injuries can also lead to vertebral fusion.
Symptoms and Clinical Presentation
Clinical symptoms depend greatly on the underlying cause and extent of the fusion:
- Reduced mobility and range of motion of the spine
- Back pain or neck pain
- Stiffness, particularly in the morning
- Neurological symptoms such as numbness or weakness in the limbs (if nerve structures are involved)
- Postural changes (e.g., stooped posture in ankylosing spondylitis)
Diagnosis
The diagnosis of spinal fusion is typically established through imaging studies:
- X-ray: Reveals bony bridges between vertebral bodies.
- Computed Tomography (CT): Provides detailed information about bony structures.
- Magnetic Resonance Imaging (MRI): Allows assessment of soft tissues, intervertebral discs, and nerve structures.
- Laboratory tests: When inflammatory or infectious causes are suspected, blood markers such as CRP, ESR, and HLA-B27 are evaluated.
Treatment
Conservative Management
When surgical intervention is not indicated, or when fusion is already established, the following conservative measures are commonly used:
- Physiotherapy to preserve remaining mobility and strengthen the back muscles
- Pain management using analgesics or non-steroidal anti-inflammatory drugs (NSAIDs)
- Heat therapy and physical treatments
- In inflammatory conditions: disease-modifying medication (e.g., biologics for ankylosing spondylitis)
Surgical Treatment (Spinal Fusion)
Surgical spinal fusion is performed when conservative measures are insufficient or when spinal instability is present. The affected vertebral bodies are permanently joined using implants (screws, plates, cages) and bone grafts. The goal is to stabilize the spine and relieve pain.
Prognosis
The prognosis depends on the underlying condition, the extent of fusion, and the success of treatment. In suitable patients, surgically performed spinal fusion can lead to significant pain relief and improved quality of life. However, fusion of one segment may increase the mechanical load on adjacent spinal segments over time, a phenomenon known as adjacent segment disease.
References
- World Health Organization (WHO): ICD-10 International Classification of Diseases, 10th Revision, Code M43.2 – Fusion of spine.
- Hoy, D. et al.: The global burden of low back pain. Annals of the Rheumatic Diseases, 2014; 73(6): 968–974.
- Epstein, N.E.: Spine surgery complications: Overview and review of the literature. Surgical Neurology International, 2020; 11: 190.
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