Spinal stenosis is characterized by the narrowing of the central spinal canal, intervertebral foramen, and/or lateral recess causing progressive nerve root compression in the cervical, thoracic, or lumbar spine. It is commonly caused by degenerative joint disease in middle-aged or elderly individuals. The main symptoms are neck pain or load-dependent lower back pain with radiation to the buttocks and legs. Spinal extension (standing or walking downhill) exacerbates pseudo- or neurogenic claudication, while back flexion (sitting or walking uphill) improves symptoms. An MRI provides the diagnosis. Treatment involves conservative therapy (analgesia, physiotherapy), while refractory cases require surgical decompression of the spinal cord (laminectomy).
- Prevalence: 5:1000 in persons > 50 years of age
- Age range: middle-aged and elderly population
- Sex: ♀ > ♂ when associated with degenerative disease
Epidemiological data refers to the US, unless otherwise specified.
- Degenerative joint disease (most common)
- Iatrogenic: following spinal surgery such as laminectomy
- Systemic disease: Paget's disease, ankylosing spondylitis, tumors
- Congenital malformations: spinal dysraphism (uncommon)
- Lumbar stenosis
- X-ray: degenerative joint changes
MRI (confirmatory test): evidence of spinal stenosis (compression of spinal nerves, nerve roots or spinal cord)
- Possible alternative: CT
|Neuropathic claudication||Vascular claudication|
|Clinical features|| |
|Exacerbating factors|| || |
|Relieving factors|| |
|Ankle-brachial index|| || |
The differential diagnoses listed here are not exhaustive.
- Symptomatic treatment
- Surgery: if conservative therapy fails