At 80 or 90, two people may be in very different states of health. One walks daily, manages their medicines and lives without help. Another of the same age has become frail after several illnesses, falls or hospital admissions. In neurosurgery this difference matters greatly. Chronological age is important information, but cannot decide on its own whether surgery is appropriate.
Neurosurgery cares for patients of all ages, from newborn babies to people over 90. In later life, the aim is rarely a ‘perfect’ postoperative image. Preserving walking, mobility, independence and quality of life often matters more. Sometimes a well-indicated operation can prevent loss of function. At other times, non-surgical treatment is the safer choice.
Which neurosurgical conditions are more common?
In the spine, wear affecting the vertebrae and discs may narrow the spinal canal, compress a nerve root or affect the spinal cord in the neck, known as cervical myelopathy. Pain, walking difficulties or weakness may result. Intracranially, findings may include meningiomas, primary brain tumours or metastases, chronic subdural haematomas, sometimes following an apparently minor head injury, and certain cerebrospinal fluid circulation disorders. Not all require surgery. A lesion found on MRI is not by itself an indication for an operation.
An important example is normal pressure hydrocephalus. Walking becomes slow and unsteady, sometimes with memory or urinary symptoms that are easily confused with other problems of ageing. In well-selected patients, an accurate diagnosis may open the way to treatment that improves walking.
What does biological health mean?
Beyond the neurosurgical diagnosis, the body's reserve matters. We assess heart and lung disease, kidney function, diabetes, nutrition, anaemia, mobility, previous falls and the ability to recover. Frailty is not the same as old age. It describes greater vulnerability to a stress such as surgery or several days confined to bed.
Careful assessment also includes memory and thinking, the risk of confusion after surgery, called postoperative delirium, and support at home. For someone who is still independent, being able to walk without help may matter more than a small difference on follow-up images. Treatment goals are agreed with the patient and family according to what is realistic and important to them.
Medicines change the planning
Many older patients take several medicines every day. Anticoagulants and antiplatelet drugs increase bleeding risk, but stopping them without good reason increases the risk of stroke or other complications from blood clots. The timing of interruption and restarting is determined individually according to the reason for treatment, kidney function, the operation and advice from the doctors caring for the patient. Patients must not stop these medicines on their own.
Other treatments matter too. Sedatives, sleeping tablets and some medicines with anticholinergic effects may worsen drowsiness, unsteadiness or confusion. Pain medicines may need adjustment, and treatment for diabetes, blood pressure or heart disease should be reviewed before anaesthesia. A complete list of medicines, including supplements, is a simple and valuable tool.
When is surgery worth considering?
There is no answer that applies to everyone. The indication depends on symptom severity and progression, agreement between clinical examination and imaging, non-surgical alternatives, and the balance between likely benefit and risk. Collaboration with anaesthesia and intensive care, cardiology, internal medicine, geriatrics and rehabilitation may be decisive. Sometimes preparation before surgery, such as treating anaemia, improving nutrition, controlling diabetes and maintaining mobility, matters as much as the choice of surgical technique.
The postoperative plan is equally important: pain control, getting out of bed as early as feasible, preventing confusion, rehabilitation and communication with the family. Even after a technically successful operation, a patient needs a pathway back to the activities that matter to them.
A consultation that asks what matters to the patient
When discussing a neurosurgical problem with an older person, we consider not only the MRI but also how they walk, how independent they are, what worries them and what they hope to regain. Sometimes the answer is an operation. At other times it is a period of observation, rehabilitation or non-surgical treatment. The right choice fits the person in front of us, even if it is not the most dramatic option.
Age remains an important number. But it is the person behind that number whom we assess.