When Back and Neck Pain Needs a Spine Surgeon

Back or neck pain needs a spine surgeon when it comes with a neurological warning sign, when it fails to settle with proper conservative care, or when its cause is uncertain. Dr. Puneet Girdhar sorts these patients into three tiers: same-day emergency referral, early referral with close observation, and routine referral after about 12 weeks of unsuccessful treatment.

The framework is built for the doctor who sees spine patients first: the general practitioner, the physician, the general surgeon. Most back pain never needs an operation. The aim of a referral system is not to send more patients to surgeons but to make sure the right ones arrive before the damage becomes permanent. This article sets out each tier as taught by Dr. Puneet Girdhar, then Vice Chairman & Head, Spine Surgery at BLK-Max Super Speciality Hospital, New Delhi, India, together with the clinical signs that place a patient in it and a case from the session that shows how a spine surgeon reasons once the referral arrives. The wider picture of which conditions end in surgery is in the complete guide to indications for spine surgery.

Tier 1: spinal emergencies and red flags that need same-day referral

Three red-flag situations call for an immediate, same-day referral to a spine surgeon.

Cauda equina syndrome: the triad to recognise

The cauda equina is the bundle of lumbar and sacral nerve roots that continues down the spinal canal below the end of the spinal cord. When a large disc or another lesion compresses it, the result is cauda equina syndrome. Dr. Girdhar described it as a triad:

1. Saddle anaesthesia: numbness over the buttocks, perineum and inner thighs, the area that would touch a saddle.
2. Weakness in the lower limbs.
3. Difficulty controlling urine.

The cause is severe pressure on the lumbar nerve roots, and the patient needs decompression as an emergency. Bladder and bowel function that is lost may not return, which is why a patient with any element of this picture should not be sent home to wait for an outpatient appointment.

Progressive neurological deficit

The second emergency is a deficit that is getting worse. The cause may be a cervical or dorsal (thoracic) myelopathy, meaning compression of the spinal cord in the neck or upper back, or the progressive retropulsion of an osteoporotic fracture, in which fragments of a collapsing vertebra are pushed backwards into the canal and the cord compression advances. The pattern to recognise is a patient who is worse day by day: walking less well, more numb, and less able to carry out daily activities independently.

Suspected infection, malignancy or vertebral fracture

The third emergency group is any suspicion of spinal infection, a malignancy involving the spine, or a vertebral fracture. Each can destabilise the spine or compress the neural elements quickly, and each needs specialist evaluation without delay.

Tier 2: early referral for sciatica and progressing nerve signs

The second tier is not an emergency, but it is not a case for prolonged waiting either. These patients can be observed for a short period, closely, while the referral is arranged. Dr. Girdhar placed the following in this tier:

• Severe radicular pain with neurological signs. Radicular pain is pain that travels along the course of a compressed nerve root: sciatica in the leg from a lumbar disc, or brachialgia in the arm from a cervical disc. When it comes with signs such as weakness or sensory loss, the patient needs an early opinion.
• A tumour pressing on the nerves, such as a neurofibroma arising from a nerve sheath, or a lipoma.
• Spondylolisthesis with new neurological symptoms: a patient with a slipped vertebra who starts to develop weakness or a disturbance of gait.
• Disabling pain that limits daily living despite six to eight weeks of treatment, whether physiotherapy, medication or, in some cases, nerve blocks. Such a patient will eventually need some form of procedure, because the pain is not settling.
• Any moderate motor or sensory deficit that is progressing in front of the patient's eyes.
• Persistent radiculopathy beyond six to eight weeks. In Dr. Girdhar's words, there is no point waiting beyond that point: a spine specialist or surgeon needs to see the patient.

The common thread is time. Six to eight weeks of genuine conservative care is the window in which most radicular pain improves. A patient who is still disabled, or who is losing function, after that window has told the clinician something important.

Tier 3: routine referral for back pain beyond 12 weeks

The third tier covers patients who should still see a spine specialist, but on a routine basis.

• Back pain that has not improved after 12 weeks of therapy, without radicular pain and without evidence of nerve root compression. These patients need to be evaluated for an underlying structural cause: a desiccated, degenerated disc; sacralisation, in which the lowest lumbar vertebra is partly fused to the sacrum; spina bifida, an incomplete closure of the bony arch; or spondylolysis, a defect in the bony bridge of the vertebra that can lead to a slip.
• Diagnostic uncertainty. A spondylodiscitis, an infection of the disc and the adjacent vertebrae, may be developing slowly. Dr. Girdhar acknowledged that this can be difficult to diagnose in outpatient practice without specialist input.
• Psychosocial yellow flags. Yellow flags are psychological and social factors, such as fear of movement, low mood or the belief that the pain is harmful, that predict a poor outcome and chronic disability from back pain. Their presence is itself a reason for specialist assessment.

Warning signs that back pain needs a spine surgeon

Three warning signs carry the most weight in a busy clinic: a falling walking distance, any upper motor neuron sign, and pain that persists despite genuine conservative care. Each was a practical point from the session.

Walking distance is a measurement. In spinal stenosis, the key history is the trend: a patient who could walk a certain distance a few months ago and now manages much less has progressive stenosis with claudication. That decline, not the absolute distance, is what moves the patient towards surgery.

Upper motor neuron signs point to the spinal cord. Brisk reflexes, spasticity and an unsteady gait in the legs point to the spinal cord, which ends at about the first or second lumbar vertebra, not to the nerve roots of the lower lumbar spine. Dr. Girdhar's message was blunt: if a patient has upper motor neuron signs, do not neglect them. He described a patient with previous lumbar fixation who became paraparetic (weak in both legs) while the problem was assumed to be in the lower back; the real cause was compression of the cord in the thoracic spine. That case is set out in revision spine surgery and neglected spinal deformity.

Conservative care must be real. The six to eight week and 12 week thresholds assume the patient has actually received treatment: physiotherapy, appropriate medication and, where indicated, nerve blocks. A patient who has simply waited has not had a trial of conservative management.

After the referral: decompression or fusion?

A case shared during the session shows how a spine surgeon turns a referral into a decision. A referring doctor in Kenya described a man in his thirties with three findings on MRI:

• A diffuse disc bulge at L4-L5, compressing the traversing nerve roots on both sides.
• A left paracentral disc protrusion at L5-S1, narrowing the left lateral recess, the channel through which the nerve root leaves the canal.
• Spinal canal stenosis, with the canal narrowed to 9.5 mm.

He was afraid of surgery.

Dr. Girdhar's decision rested on two questions.

Is there significant back pain, and is the segment unstable? If the patient has no significant back pain and no instability, the preferred operation is a decompression alone. That can be done through biportal endoscopy, with two incisions of about 4 to 5 mm to 1 cm at two separate points, or through a minimally invasive tubular approach with a single 2.5 cm incision. If a large disc is present, the discectomy is done at the same time.

If there is instability, what needs to be rebuilt? If the patient has significant back pain and dynamic X-rays (images taken bending forward and backward) show instability, or there is a lysis, a collapsed disc space or foraminal stenosis, he needs a transforaminal lumbar interbody fusion (TLIF). That means a cage between the vertebrae and screws to stabilise the segment, restoration of disc height, decompression of both foramina and restoration of spinal balance.

The rule is worth stating plainly because it is the decision a referring doctor most often has to explain to a patient: decompression for nerve compression in a stable spine, fusion when the spine is unstable or the disc space has collapsed. Dynamic X-rays are the test that shows instability. Treatment-cost guidance for both operations is on the spinal decompression and fixation and TLIF pages.

Counselling the patient who is afraid of surgery

The young man in this case represents a very common counselling problem, and Dr. Girdhar's view was direct. A patient who has exhausted medication and physiotherapy and is still suffering, still returning to his doctors for help, needs an operation, even though he is afraid of one.

Fear of spine surgery, in his experience, is rooted in the operations of the past: wide laminectomies that left patients unstable, and stories of friends or relatives who did badly. The answer is not to dismiss the fear but to show the patient how far the surgery has moved. A decompression through a 2.5 cm incision, or a fusion through four small incisions with the muscles preserved, is a different proposition from the operation the patient's neighbour had. The techniques themselves are covered in surgery for spondylolisthesis, stenosis and spinal fractures.

Dr. Girdhar also made the case for referring doctors to see the procedures for themselves. Until a doctor has watched an operation, it is difficult to explain to a patient with conviction what will happen and what to expect. The full exchange, including his answers on observerships, is recorded in the Live Discussion.

When to refer back and neck pain: summary for referring doctors

For deformity in children, the referral thresholds are different and are set out in the revision and deformity article: in Dr. Girdhar's practice, a curve crossing 40 degrees, or any deformity associated with a hemivertebra.