When Is Spine Surgery Needed? Signs, Stay and Cost

When is spine surgery needed? Only when an identifiable cause, such as compression of a nerve or the spinal cord, explains the patient's pain or weakness and does not settle with medical treatment. Dr. SK Rajan, Chief - Neuro Spine Surgery & Additional Director - Neurosurgery, Artemis Hospitals, Gurugram, India, says most back pain resolves with medicines in six to eight weeks, and a bad-looking MRI is not, by itself, a reason to operate.

This article sets out the conditions that do call for surgery, the symptoms that should prompt a referral, the cases Dr. Rajan uses to show what surgery achieves, and the figures he gave for hospital stay and cost. It sits alongside the complete guide to making spine surgery safe, which explains how complications are prevented.

Does back pain need surgery?

Usually not. Back pain is close to universal: almost everyone experiences it at some point in life. In the majority of patients, Dr. Rajan notes, it becomes better with medicines in a matter of six to eight weeks, because the cause is mostly muscular. Physiotherapy and exercises carry most of the remaining patients through without an operation.

That baseline frames every surgical decision. Before recommending surgery, the surgeon has to answer three questions, which Dr. Rajan states as working rules:

1. Is there an identifiable cause? If the cause of the pain or weakness cannot be found, it is not a case for surgery.
2. Is the complaint more than simple pain? Simple back pain or simple leg pain is often not a good indication for surgery.
3. Do the symptoms match the scan? A patient whose MRI looks bad does not necessarily need surgery.

The last rule matters because disc bulges and wear in the spinal joints are common on MRI in adults without any symptoms, so the scan has to be read against the patient's history and examination. Patients sometimes travel long distances for an operation with no major reason for one; in Dr. Rajan's framework, that is an error of diagnosis and one of the three root causes of complications in spine surgery.

When is spine surgery needed? The warning signs

Spine surgery is the right treatment for a defined subset of patients. Dr. Rajan groups them by what the referring doctor sees:

• Nerve compression in the neck (cervical spondylosis): neck pain, pain travelling into the arm, weakness in the arm, and sometimes weakness of the legs.
• Spinal cord compression: weakness of the arms or legs, difficulty walking, poor balance and numbness.
• Lumbar canal stenosis: inability to stand or walk for long, pain, tingling or burning going into the legs, limping.
• Fractures: from an accident, or from osteoporosis in older patients, where the fracture does not settle with medicines.
• Tumours, infections and spinal deformity: covered in depth in the article on spinal tuberculosis, tumours and scoliosis.

Weakness is the symptom that changes the urgency. Pain alone can often be managed medically; loss of power in an arm or a leg indicates that a nerve or the spinal cord is under pressure. Separately, new difficulty passing urine, loss of bowel control or numbness around the saddle area are recognised emergency signs of compression of the nerves at the base of the spine and need urgent assessment.

Cervical radiculopathy: decompression and disc replacement

Cervical spondylosis is the age-related degeneration of the discs and joints of the neck. When a worn disc or bony spur presses on a nerve root, the result is radiculopathy: pain, numbness or weakness along the course of that nerve into the arm.

Dr. Rajan presented a patient who came with neck pain and pain going into the arm, caused by a compressed nerve. The patient had also become so weak that he could not lift his right arm. The operation removed the disc and replaced it with an implant. He was discharged home three days after surgery, and with a few weeks of physiotherapy his strength was expected to return to normal, because the pressure on the nerve had been removed.

A second patient had a slipped segment in the neck pressing on the left nerve and could not lift the left arm. After surgery, the power in that arm improved significantly and the patient was nearly normal.

Where the disc is removed, it can be replaced with an artificial disc. Dr. Rajan describes this disc replacement as preserving movement of the neck after surgery, performed through a minimally invasive approach with hardly any scar. The cost of anterior cervical discectomy and fusion, the most common operation for this problem, is set out on a separate page.

Cervical myelopathy: surgery for spinal cord compression

Spinal cord compression from a tight canal is treated by decompression, removal of the bone and tissue pressing on the cord, combined with fixation, screws and rods that stabilise the segment. It is a more serious pattern than nerve compression: tightness along the whole spinal canal compresses the spinal cord itself. In the neck, this is called cervical myelopathy. Patients present with weakness of the arms or the legs, an inability to walk or to balance, or numbness. Dr. Rajan showed videos of such patients before and after surgery, with recovery continuing over weeks and months of physiotherapy. In his words, patients like these benefit significantly from spinal surgery.

Lumbar canal stenosis: keyhole surgery

Lumbar canal stenosis is narrowing of the spinal canal in the lower back. Dr. Rajan describes it as a very common problem, and one he sees frequently in patients from Africa. The narrowing has three usual causes: a slipped disc, spondylolisthesis (one vertebra slipping forward on the one below) and hypertrophy, or enlargement, of the facet joints at the back of the spine.

The symptoms are characteristic. Patients cannot walk or stand straight because of severe pain, they limp, and they cannot walk long distances. The case for surgery rests on that damage to quality of life: how far the condition limits the patient's ability to stand, walk and work.

For these patients, Dr. Rajan's team now performs keyhole spine surgery, which he calls a revolution in the field. Instead of a long incision, the pressure on the nerves is removed through small cuts about one inch long, and the spine is fixed with screws. The patient walks the very next day. The cost of spinal decompression and fixation surgery is listed separately. His other masterclass sets out the minimally invasive lumbar fusion technique step by step.

Isthmic spondylolisthesis: keyhole surgery for a slipped vertebra

Isthmic spondylolisthesis, a vertebra slipping forward because of a small fracture in its bony arch, is now treated by keyhole surgery. Dr. Rajan singled out this form of spondylolisthesis as one he sees frequently among women referred from Africa, and attributes it to genetic predisposition. The fracture in the bony arch at the back of the vertebra allows the vertebra to slip forward and compress the nerves. The underlying defect, in the part of the arch called the pars interarticularis, is known as spondylolysis.

In the keyhole operation, the displaced vertebra is brought back from its slipped position to its correct place and fixed through small incisions.

Osteoporotic spinal fracture: vertebroplasty and cement-augmented screws

Osteoporotic spinal fractures are treated with bone cement: injected into the fractured vertebra, or delivered through screws when fixation is needed. Osteoporotic fracture of the spine in older people is, in Dr. Rajan's words, a very common problem nowadays. A weakened vertebra collapses, often after little or no injury, and causes pain that limits movement.

His example was an elderly woman with a fracture of one vertebra. The fractured bone was injected with bone cement through a minimally invasive route, a procedure known as vertebroplasty, and she walked the very next day.

When fixation with screws is needed in osteoporotic bone, the problem is that screws grip weak bone poorly. Specialised technology now allows cement to be delivered through the screws themselves. The cement is prepared by mixing a liquid with a powder, then injected into the screw, so that it strengthens the bone around it and gives the screw a firm grip. Dr. Rajan's point is that elderly women who are overweight or have osteoporosis no longer need open surgery: they can undergo keyhole surgery with a secure fixation.

How long is the hospital stay after spine surgery?

The usual hospital stay after spine surgery is about three to four days, and the time in the country about two weeks, for the typical international patient Dr. Rajan described: one who arrives walking, with pain in the neck or arm, or pain in the lower back going into the legs. The precautions that follow, and the timeline for recovery after spine surgery and return to sport, are covered in his separate masterclass on minimally invasive spine surgery.

Cost of spine surgery in India

Dr. Rajan put the cost of spine surgery at Artemis Hospitals at $3,500 for a discectomy and decompression, $5,500 or $6,000 for fixation at one level, and up to $10,000 for more complicated cases. These are the ranges patients at his hospital most commonly bear:

• Discectomy and decompression: $3,500.
• Fixation of the spine at one level: $5,500 or $6,000.
• More complicated cases: up to $10,000.

These figures applied at the time of the masterclass in September 2024. The final cost for any patient depends on the diagnosis and the number of levels treated. Procedure-level estimates are also listed on the microdiscectomy cost page.

How referring doctors can use these indications

For a doctor deciding whether to refer, the indications reduce to a short test. Refer for a surgical opinion when there is a clear structural cause on imaging that matches the symptoms, and when there is weakness, cord compression, disabling stenosis, a fracture that has not settled, or a tumour, infection or deformity. Continue medical treatment, physiotherapy and exercise for simple back or leg pain, particularly in the first six to eight weeks.

Questions from referring doctors about cost and length of stay are recorded in the Live Discussion from this masterclass.