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M43.3 Spondylolisthesis – Causes, Symptoms & Treatment
M43.3 is the ICD-10 code for spondylolisthesis, a condition where one vertebra slips forward over another, potentially causing back pain and neurological symptoms.
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M43.3 is the ICD-10 code for spondylolisthesis, a condition where one vertebra slips forward over another, potentially causing back pain and neurological symptoms.
What is M43.3 (Spondylolisthesis)?
M43.3 is the ICD-10 diagnosis code for spondylolisthesis, a spinal condition in which one vertebra slips forward over the vertebra directly below it. This displacement can narrow the spinal canal, irritate nerve roots, and lead to chronic back pain and neurological complaints.
Causes
Spondylolisthesis can result from several different underlying causes:
- Degenerative: Age-related wear and tear of the intervertebral discs and facet joints, most common in older adults
- Isthmic: Stress fracture of the vertebral arch (spondylolysis), often seen in young, physically active individuals
- Congenital: A malformation of the facet joints present from birth
- Traumatic: Fracture resulting from an accident or external force
- Pathological: Caused by underlying diseases such as tumors or osteoporosis
- Postoperative (iatrogenic): Occurring as a consequence of prior spinal surgery
Grades of Severity
Spondylolisthesis is classified using the Meyerding grading system, based on the degree of forward displacement of the vertebra:
- Grade I: Up to 25% displacement
- Grade II: 25 to 50% displacement
- Grade III: 50 to 75% displacement
- Grade IV: 75 to 100% displacement
Symptoms
Not all patients experience symptoms. Common complaints include:
- Chronic lower back pain, especially in the lumbar region
- Pain radiating into the buttocks or legs (sciatica)
- Tingling, numbness, or weakness in the legs
- Stiffness and reduced range of motion in the spine
- Gait disturbances in cases of significant nerve compression
Diagnosis
Diagnosis is established through:
- X-ray: Initial imaging to assess vertebral displacement, including flexion and extension views
- MRI (Magnetic Resonance Imaging): Detailed visualization of discs, nerves, and soft tissues
- CT (Computed Tomography): Assessment of bone structure and potential fractures in the vertebral arch
- Neurological examination to evaluate reflexes, muscle strength, and sensation
Treatment
Conservative Treatment
In mild to moderate cases, non-surgical treatment is recommended first:
- Physiotherapy to strengthen and stabilize the spinal muscles
- Pain medication (e.g., NSAIDs such as ibuprofen or diclofenac)
- Heat therapy and manual therapy
- Activity modification and avoidance of high-impact sports
- Epidural injections for severe nerve pain
Surgical Treatment
Surgery may be considered in cases of severe displacement, significant neurological deficits, or failure of conservative therapy:
- Spinal fusion (spondylodesis): Permanently joining the affected vertebrae together
- Decompression surgery: Widening the spinal canal to relieve pressure on the nerves
Prognosis
With early treatment and regular spinal muscle training, the prognosis for Grade I and II spondylolisthesis is generally favorable. Higher-grade cases more frequently require surgical intervention, but many patients experience significant improvement in quality of life following successful surgery.
References
- Meyerding HW. Spondylolisthesis. Surg Gynecol Obstet. 1932;54:371–377.
- Wiltse LL, Newman PH, Macnab I. Classification of spondylolysis and spondylolisthesis. Clin Orthop Relat Res. 1976;117:23–29.
- World Health Organization. ICD-10 Version 2019, Code M43.3 – Spondylolisthesis. Available at: https://icd.who.int/browse10/2019/en#/M43.3
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