When is Spinal Surgery Actually Necessary?

Back pain and neck pain are extremely common problems, and many people are worried that surgery may ultimately be required. One of the most frequent things I hear from patients at their first consultation is: “I really don’t want an operation”. The good news is that the majority of spinal conditions do not require surgery at all, and many patients improve with time, physiotherapy, activity modification, or other conservative treatments.

So when is spinal surgery actually necessary?

The answer depends on several important factors, including the severity of symptoms, how long those symptoms have been present, whether there is evidence of nerve or spinal cord compression, and whether there is progressive neurological dysfunction such as arm or leg weakness, bowel or bladder incontinence, or difficulty walking.

In general, spinal surgery is considered when one or more of the following situations occurs:

• Severe nerve compression pain that is not improving despite appropriate non-operative treatment, including steroid injections;

• Progressive weakness or numbness caused by nerve compression;

• Spinal cord compression causing balance difficulty, clumsiness, or gait disturbance;

• Loss of bowel or bladder function associated with spinal nerve compression;

• Structural spinal instability;

• Significant impairment of quality of life or ability to function at home or at work.

One of the most important things to understand is that the results of radiological investigations (including CT and MRI scans) alone do not automatically mean surgery is required. Degenerative changes are extremely common as we age, and many people with significant abnormalities on their scans may have little or no symptoms at all. Conversely, some patients with relatively modest imaging changes can have quite severe symptoms and may benefit from surgery. Because of this, your scans must always be interpreted in the context of your symptoms and your clinical examination findings, and an experienced surgeon will take the time to listen to your symptoms and perform a focused physical examination before going through your scans with you to make sure the treatment advice you are provided is appropriate and individualised just for you.

Sciatica caused by a lumbar disc prolapse is a very good example. Acute disc prolapses often improve naturally over several weeks as inflammation settles and as the prolapsed disc gradually resolves, and most acute disc prolapses do fully recover with rest. Many patients therefore improve with time, physiotherapy, pain medications, or targeted CT-guided cortisone nerve root injections, and surgery is usually reserved for patients with persistent severe pain, progressive weakness, or significant impairment in daily function that have not resolved despite waiting an appropriate amount of time.

Similarly, degenerative change in the cervical spine can often be managed conservatively, and some patients with advanced degenerative disease and severe nerve root compression may have very little symptoms at all in which case surgery is not required. However, when compression of the spinal cord develops — known as cervical myelopathy — surgery is frequently recommended because spinal cord dysfunction may progressively worsen over time and sometimes become irreversible if left untreated, and sometimes surgery is necessary not to improve current function but to prevent future functional deterioration.

Another important consideration is the patient themselves. Some patients have relatively mild symptoms and are coping well, while others may have occupations or lifestyles that are severely affected by their condition. Other patients who may benefit from surgery are medically too unwell to have a general anaesthetic, and patients who have had recent heart attacks or strokes may be on powerful blood thinning medications that cannot safely be stopped in order to have elective spinal surgery. Treatment decisions therefore need to be individualised rather than based solely on imaging findings, and an experienced surgeon will take all of these things into consideration when making treatment recommendations.

A spinal operation is never something that should be undertaken lightly. Surgery is invasive and has potential risks associated with it in addition to the clinical benefits, and the recovery period after spinal surgery may last for many weeks or months. Part of my role is to help patients carefully weigh the potential benefits and risks of proposed intervention, and to explore non-operative treatment alternatives such as medications or steroid injections before resorting to surgery. In some cases surgery can be life-changing and dramatically improve pain, mobility, or neurological function; in other situations continued conservative treatment may be more appropriate.

One of the most reassuring things I can tell patients is that seeing a Neurosurgeon does not automatically mean you need surgery. Often the consultation is simply about obtaining an expert opinion, understanding the diagnosis more clearly, and discussing all available treatment options, and some patients are simply satisfied with having a clearer understanding about what changes are happening in their spine rather than seeking anything surgical or interventional.

Ultimately, my goal is not simply to perform an operation for every patient that is referred to me, but rather to provide a thoughtful and professional assessment of each individual patient I see, and to help them achieve the best possible long-term outcome and quality of life.