Spinal Stenosis
Understanding spinal canal narrowing — causes, symptoms and surgical decompression treatment in Lahore, Pakistan
What is Spinal Stenosis?
Spinal stenosis is the narrowing of the spinal canal — the bony tunnel running through the vertebrae that protects the spinal cord and the nerve roots branching off it. As the canal narrows, there is less room for these neural structures, and they can become compressed, stretched, or irritated. This produces a mix of pain, numbness, tingling, and weakness that depends heavily on which part of the spine is affected.
Stenosis usually develops gradually over years, which is why many patients cannot pinpoint an exact moment their symptoms began — instead, they notice that a walk to the market that was once easy now needs a rest stop halfway, or that their hands have become a little clumsier with buttons and cutlery. It most commonly affects the lumbar (lower back) spine in people over 50, though cervical (neck) stenosis is also common and carries a different, often more urgent, risk profile.
Dr. Waqas Mehdi, FCPS Neurosurgeon at MidCity Hospital Lahore, is one of Lahore's leading experts in diagnosing and surgically treating spinal stenosis, using MRI findings together with a careful history of exactly when and how symptoms appear to decide whether conservative care or surgery is the right path.
Neurogenic Claudication — Why Walking Becomes Painful
The single most recognisable pattern of lumbar spinal stenosis is called neurogenic claudication — though most patients never hear that term and simply describe it as "my legs give up after a few minutes of walking." It happens because standing upright and walking naturally extend the lower spine, which further narrows an already tight canal and starves the nerve roots of blood flow and space.
This "flexion-relief, extension-worsening" pattern is one of the most useful clues in the entire consultation, because it points strongly toward spinal stenosis rather than a hip, muscular, or vascular cause of leg pain.
Spinal Stenosis vs Vascular Claudication — How Doctors Tell Them Apart
Leg pain that appears with walking has two common causes that are frequently confused with each other: neurogenic claudication from spinal stenosis, and vascular (arterial) claudication from poor blood circulation in the legs. Getting this distinction right matters, because the treatments are completely different.
Neurogenic Claudication (Spinal Stenosis)
- Relieved by sitting or bending forward, not just stopping
- Distance to symptom onset varies with posture (uphill/leaning forward is often easier than downhill)
- Foot pulses are usually normal
- May be associated with back pain, numbness, or weakness
Vascular Claudication (Poor Circulation)
- Relieved simply by stopping and standing still — sitting is not required
- Consistent walking distance regardless of posture; worse uphill
- Foot pulses often weak or absent, skin may be cool or discoloured
- Associated with smoking, diabetes, high cholesterol, heart disease
In practice, the two conditions can coexist, particularly in older patients, so Dr. Waqas Mehdi examines pulses and correlates the pattern of pain with MRI findings before confirming spinal stenosis as the cause.
Lumbar vs Cervical Spinal Stenosis — Different Symptoms, Different Urgency
Lumbar Spinal Stenosis
The most common form, affecting the lower back. Symptoms are mainly in the legs — pain, heaviness, cramping, tingling, or numbness that follows the classic neurogenic claudication pattern described above. It usually progresses slowly over years and, while it can significantly limit walking distance and quality of life, it is rarely a neurological emergency. Bladder or bowel involvement (cauda equina syndrome) is rare but requires immediate surgery when it occurs.
Cervical Spinal Stenosis
Narrowing in the neck is more concerning, because it can compress the spinal cord itself rather than just individual nerve roots — a condition called cervical myelopathy. Instead of leg claudication, patients typically notice hand clumsiness (dropping objects, difficulty with buttons or handwriting), unsteady or wide-based gait, tingling that spreads down the body, and sometimes a tight "band-like" sensation around the trunk. Because myelopathy can progress silently and cause irreversible spinal cord damage, cervical stenosis with cord compression is treated more urgently than lumbar stenosis, even when pain is mild or absent.
Causes of Spinal Stenosis
Spinal stenosis is not a single disease but the end result of several different processes that all reduce the space available in the spinal canal:
Degenerative Changes (By Far the Most Common)
Age-related wear causes the facet joints to enlarge with osteoarthritic bone spurs, the ligamentum flavum (the ligament lining the back of the canal) to thicken and buckle inward, and the intervertebral discs to bulge or collapse in height. Together these changes gradually squeeze the canal from all sides — this is the mechanism behind the majority of stenosis cases seen after age 50.
Congenital Narrow Canal
Some people are simply born with a naturally narrower spinal canal or shorter pedicles. This alone may cause no symptoms for decades, but it leaves much less "reserve space," so even mild degenerative change later in life is enough to produce symptoms earlier than in someone with an average-sized canal.
Spondylolisthesis-Related Stenosis
When one vertebra slips forward over the one below it, the canal at that level narrows further, often adding a mechanical instability component on top of straightforward degenerative narrowing. This combination frequently needs decompression plus fusion rather than decompression alone.
Post-Surgical Scarring
Scar tissue (epidural fibrosis) forming after previous spine surgery can occasionally re-narrow the canal or tether nerve roots, producing recurrent symptoms months or years after an initially successful operation.
Do I Need Surgery for Spinal Stenosis, or Will Physiotherapy Help?
This is the question almost every patient asks first, and the honest answer is: it depends on severity and trajectory, not on age alone.
Conservative Management — Reasonable First Step for Mild-Moderate Cases
Physiotherapy focused on core strengthening and flexion-biased exercises, anti-inflammatory or nerve-pain medication, activity modification, and image-guided epidural steroid injections can meaningfully reduce symptoms for many patients, buying months to years of comfortable function without surgery.
When Surgery Becomes the Better Option
Surgery is generally recommended when walking distance keeps shrinking despite conservative treatment, when leg weakness or numbness is present or progressing, when cervical myelopathy is diagnosed (since this rarely improves with physiotherapy alone and can worsen if left untreated), or when quality of life is significantly affected by pain that limits daily activities.
What Happens During Laminectomy Surgery?
Laminectomy — the standard decompression operation for spinal stenosis — involves removing the lamina (the back part of the vertebral bone covering the spinal canal), along with any bone spurs and the thickened ligament pressing on the nerves. This creates more room for the spinal cord and nerve roots without needing to touch the disc or the front of the spine in straightforward cases.
Standard (Open) Laminectomy
Performed under general anaesthesia through a midline back incision. Bone, bone spurs, and ligament are removed to fully decompress the affected level(s). Very effective, with excellent long-term relief of leg symptoms in the large majority of patients.
Minimally Invasive / Endoscopic Decompression
Performed through a smaller incision using a tubular retractor or endoscope, preserving more of the surrounding muscle and ligament. Suitable for selected single-level stenosis, with the advantage of less post-operative pain and a faster return to activity.
Laminectomy with Spinal Fusion
Added when stenosis is combined with spondylolisthesis or spinal instability, using screws and rods to stabilize the segment after decompression and prevent further slippage. See Spinal Fusion Surgery for details.
Recovery expectations: most patients are walking the same day or the day after surgery, and are discharged within 2-4 days. Leg pain relief is often immediate, since pressure on the nerve is released directly on the operating table, although numbness can take weeks to months to fully settle, and any longstanding weakness may only partially recover. Light activity typically resumes by 2-3 weeks, with a full return to normal routine by around 6 weeks, guided by Dr. Waqas Mehdi's post-operative follow-up.
Frequently Asked Questions
Can spinal stenosis be reversed without surgery?
Is walking bad for spinal stenosis?
What is the recovery time for laminectomy surgery?
Can spinal stenosis cause permanent leg weakness?
At what age does spinal stenosis usually start?
How is spinal stenosis diagnosed?
What is the difference between laminectomy and spinal fusion for stenosis?
Who is the best doctor for spinal stenosis treatment in Lahore?
Expert Spinal Stenosis Treatment in Lahore
If your walking distance is getting shorter, your legs feel heavy after a few minutes on your feet, or your hands have become clumsier, Dr. Waqas Mehdi can help. Accurate diagnosis and, where needed, expert decompression surgery for rapid relief.
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