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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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Things worth knowing about "M43.3"

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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