Discectomy

What is Discectomy?

A Discectomy is a spine surgery performed to remove the damaged or herniated portion of an intervertebral disc that is pressing on a spinal nerve or the spinal cord. The procedure aims to relieve radiating pain, numbness, tingling, and weakness caused by nerve compression.

Intervertebral discs are soft, cushion-like structures located between the vertebrae. Each disc has a tough outer layer and a softer inner centre. When the outer layer develops a tear, the inner material may protrude or leak outward, creating a herniated or slipped disc.

A discectomy removes only the portion of the disc responsible for nerve compression whenever possible. The complete disc is not usually removed during a lumbar microdiscectomy. The procedure may be performed using open, microscopic, tubular, or endoscopic techniques, depending on the location of the disc and the patient’s condition.

Dr. Yadhu K Lokanath, Consultant Neurosurgeon and Spine Surgeon in Bangalore, evaluates the symptoms, neurological findings, and imaging results before recommending discectomy surgery.

What Conditions Can Discectomy Treat?

Discectomy may be considered for:

• Lumbar disc herniation
• Cervical disc herniation
• Sciatica
• Lumbar radiculopathy
• Cervical radiculopathy
• Recurrent disc prolapse
• Disc fragments that have migrated into the spinal canal
• Severe nerve-root compression
• Persistent pain following conservative treatment
• Cauda equina syndrome caused by a large lumbar disc prolapse

The operation is generally more effective for radiating arm or leg pain caused by nerve compression than for isolated neck or lower-back pain.

What is the Anatomy Involved?

The structures involved in discectomy include:

• Vertebrae
• Intervertebral discs
• Spinal canal
• Spinal cord
• Spinal nerve roots
• Lamina
• Ligaments
• Facet joints
• Surrounding muscles

In the lower back, a herniated disc may compress a lumbar or sacral nerve root and cause sciatica. In the neck, disc material may compress a cervical nerve root or, in some cases, the spinal cord.

What are the Symptoms?

Patients who may require discectomy can experience:

• Lower-back pain travelling into the leg
• Neck pain travelling into the arm
• Sciatica
• Burning or electric-shock-like pain
• Numbness or tingling
• Muscle weakness
• Reduced grip strength
• Difficulty lifting the foot
• Pain aggravated by coughing or sneezing
• Difficulty walking or standing
• Reduced ability to work or sleep

Symptoms depend on the location and severity of nerve compression.

When Should I See a Spine Surgeon?

Consult a spine surgeon if radiating arm or leg pain persists despite medication, physiotherapy, activity modification, or spinal injections.

Seek urgent medical attention if you develop:

• Progressive arm or leg weakness
• Foot drop
• Loss of bladder or bowel control
• Numbness around the genital or inner-thigh region
• Severe difficulty walking
• Loss of hand coordination
• Sudden symptoms affecting both legs

Bladder or bowel dysfunction with saddle-region numbness may indicate cauda equina syndrome, which requires urgent assessment and may need prompt surgical decompression.

How is a Disc Herniation Diagnosed?

Diagnosis may involve:

• Detailed medical history
• Physical examination
• Neurological examination
• Straight-leg-raise test
• MRI of the affected spinal region
• CT scan when MRI is unsuitable
• X-rays
• Dynamic X-rays when instability is suspected
• EMG or nerve conduction studies in selected cases

MRI helps identify the affected disc, the position of the herniated fragment, and the degree of nerve compression.

Can It Be Managed Without Surgery?

Many slipped discs improve without surgery. Initial treatment may include:

• Short-term activity modification
• Anti-inflammatory medication
• Pain-relieving medication
• Neuropathic pain medication
• Physiotherapy
• Core-strengthening exercises
• Posture correction
• Heat or ice application
• Epidural steroid injection
• Selective nerve-root block

Prolonged bed rest is generally avoided. Surgery is considered when symptoms remain severe or neurological function begins to deteriorate.

When is Discectomy Needed?

Discectomy may be advised when:

• Severe radiating pain persists despite conservative care
• MRI confirms nerve compression matching the symptoms
• Weakness is progressive
• Pain significantly affects sleep, mobility, or work
• Conservative treatment has failed
• A large disc fragment compresses the spinal canal
• Cauda equina syndrome develops
• Recurrent disc prolapse causes significant symptoms

The decision is based on the patient’s symptoms and examination, not on MRI findings alone.

Types of Discectomy

Microdiscectomy

A small incision is made, and a microscope is used to remove the disc fragment compressing the nerve. It is commonly performed for lumbar disc herniation.

Tubular Discectomy

A tubular retractor creates a narrow pathway to the spine while limiting muscle disruption.

Endoscopic Discectomy

A camera and fine instruments are introduced through a small incision to remove the herniated disc. This minimally invasive technique may allow reduced tissue damage in appropriately selected patients.

Cervical Discectomy

A cervical disc may be removed through the front or back of the neck. An anterior procedure may be followed by fusion or artificial disc replacement when required.

How is the Procedure Performed?

Discectomy is usually performed under general anaesthesia. The surgeon creates an incision over the affected spinal level and carefully reaches the compressed nerve.

A small portion of bone or ligament may be removed to access the disc. The nerve is gently protected while the herniated disc fragment is removed. The remaining healthy disc is preserved as far as possible.

Fusion is not routinely required after a simple lumbar microdiscectomy but may be considered if significant instability, deformity, or extensive disc removal is present.

Recovery and Possible Risks

Many patients are encouraged to walk on the day of surgery or the following day. Hospital discharge may occur the same day or after a short stay, depending on the procedure and overall health.

Patients should temporarily avoid heavy lifting, repeated bending, and twisting. Physiotherapy may be recommended to restore strength, flexibility, and safe movement.

Possible risks include:

• Infection
• Bleeding
• Nerve injury
• Spinal-fluid leakage
• Persistent pain or numbness
• Recurrent disc herniation
• Scar tissue formation
• Spinal instability
• Blood clots
• Need for further surgery

Why Choose Dr. Yadhu K Lokanath?

Dr. Yadhu K Lokanath offers:

• Detailed neurological and spine evaluation
• Fellowship training in minimally invasive and endoscopic spine surgery
• Expertise in cervical and lumbar disc disorders
• Careful review of MRI findings
• Microscopic, tubular, and endoscopic treatment planning
• Evidence-based surgical recommendations
• Personalised rehabilitation guidance
• Comprehensive postoperative follow-up

Frequently Asked Questions

Is discectomy a major surgery?

It is a spine operation, but minimally invasive techniques may reduce incision size and tissue disruption in selected patients.

Does discectomy remove the entire disc?

Usually, only the herniated or damaged portion pressing on the nerve is removed.

How soon can I walk after surgery?

Most patients begin walking on the same day or the following day.

Will discectomy cure back pain?

The procedure is mainly intended to relieve radiating nerve pain. Improvement in local back pain may be less predictable.

Can the disc herniate again?

Yes. Recurrent herniation can occur at the operated level, although most patients recover without recurrence.

When can I return to work?

Return to work may range from a few weeks to longer, depending on the procedure, symptoms, and physical demands of the job.

Book an Appointment

Persistent sciatica, radiating arm pain, numbness, or muscle weakness may indicate nerve compression caused by a herniated disc. When medication, physiotherapy, and injections do not provide sufficient relief, discectomy may help relieve pressure on the affected nerve.

Consult Dr. Yadhu K Lokanath, Consultant Neurosurgeon and Spine Surgeon in Bangalore, for expert evaluation and a personalised treatment plan.