WHAT DOES IT MEAN? | Neurosurgical Terms Explained for Patients - Radiculopathy: What Does It Mean? When a Patient Says, “I Have a Pinched Nerve”

“The pain travels down my leg.” “My fingers keep going numb.” “I get an electric shock-like sensation down my arm.” Before coming across terms such as radiculopathy, stenosis or nerve root compression, patients are usually much more familiar with their symptoms than with the medical terminology used to describe them. In this article, we start with those symptoms to explain what radiculopathy means, what may cause it, and why what is commonly described as a “pinched nerve” does not always correspond to the same diagnosis.

Before the Diagnosis Come the Symptoms

When a problem first develops, patients rarely begin their journey using medical terminology.

The reason is simple: before receiving a diagnosis, they often do not yet know the medical term for what they are experiencing.

More importantly, already being familiar with terms such as radiculopathy, myelopathy, foraminal stenosis or spondylolisthesis would, in most cases, mean that the problem has already been given at least a preliminary clinical definition.

At the beginning, there are symptoms.

“The pain travels down my leg.”

“My fingers keep going numb.”

“I get an electric shock-like sensation down my arm.”

“I can’t lift my foot properly anymore.”

“I’ve been told I have a pinched nerve.”

These are often the words with which a patient’s journey begins.

This is also the principle behind the series “What Is Happening to Me?”: When Spinal Symptoms Require a Neurosurgical Assessment: starting with what patients actually experience, before they even know the name of the condition that may be causing their symptoms.

With this new series of articles, I would like to take the opposite approach to a medical textbook: starting with the words patients themselves use and, step by step, exploring what those words may mean from a medical perspective.

Not to turn a symptom into a diagnosis — because the same symptom can have different causes — but to help patients better understand the medical terms they may later come across in a report, during a specialist consultation or following a diagnostic test.

Let us begin with a word that may sound complicated:

radiculopathy.

What does it mean?

And how does it relate to what many patients simply describe as “a pinched nerve”?

“Pinched Nerve”: What Does It Mean?

“Pinched nerve” is an expression I hear very often from patients.

Sometimes they use it after reading an MRI report. At other times, it is simply how they describe pain that travels from the lower back down the leg, or from the neck into the shoulder, arm or hand.

But “pinched nerve” is not a medical diagnosis.

What is commonly described in this way may correspond to compression or irritation of a nerve root.

This brings us to two medical terms:

nerve root compression and radiculopathy.

They do not mean exactly the same thing.

IN BRIEF – WHAT DOES RADICULOPATHY MEAN? Radiculopathy is a condition in which a nerve root is affected by a process that alters its function. It may cause radiating pain, tingling, altered sensation and, in some cases, muscle weakness.

What Is a Nerve Root?

To understand what radiculopathy means, we first need to understand which structure is involved.

Nerve fibres arising from the spinal cord travel through the spinal nerve roots and contribute to the formation of the nerves that extend to different parts of the body.

The nerve roots leave the spinal column through specific openings between the vertebrae.

If a nerve root becomes compressed or irritated, symptoms may occur some distance away from the actual site of the problem.

This is why a condition affecting the lumbar spine may cause pain, tingling or altered sensation along the leg.

Similarly, a condition affecting the cervical spine may cause symptoms that extend into the shoulder, arm, hand or fingers.

This is one of the reasons why, when symptoms appear to affect an area some distance from the spine, it may be necessary to determine whether they originate from a spinal condition.

Nerve Root Compression and Radiculopathy: What Is the Difference?

This distinction is important.

Nerve root compression primarily describes an anatomical finding: a structure comes into contact with a nerve root and may reduce the space available to it.

Radiculopathy, on the other hand, refers to the clinical consequences of impaired nerve root function.

Symptoms may include:

• radiating pain;

• tingling;

• burning or electric shock-like sensations;

• altered sensation;

• muscle weakness;

• changes in reflexes.

This also means that seeing nerve root compression on an MRI scan does not automatically mean that radiculopathy is present.

Imaging findings must always be interpreted alongside the patient’s symptoms and neurological examination.

Why Can a Nerve Root Become Compressed?

There are several possible causes.

One of the most widely recognised is a herniated disc.

When part of an intervertebral disc protrudes beyond its normal position, it may come into contact with a nerve root and compress it.

But this is not the only possible cause.

Over time, changes affecting the discs, joints and bony structures of the spine may reduce the space through which the nerve roots pass.

In these cases, stenosis may be present.

Other spinal conditions may also alter the space available for the neurological structures.

This is why “pinched nerve” provides an intuitive description, but does not yet tell us what is actually causing the problem.

“The Pain Travels Down My Leg”: Is It Radiculopathy?

It may be, but this cannot be established from the description of the pain alone.

When pain starts in the lower back or buttock and radiates down the leg, it is often referred to as sciatica or lumbosciatica.

One possible cause is irritation or compression of a lumbar nerve root.

However, the term “sciatica” primarily describes a pattern of symptoms.

The next question should therefore be:

why is that nerve root irritated or compressed?

There may be a herniated disc.

There may be stenosis.

Or the pain may have a different cause altogether.

This is precisely why an assessment should go beyond the term used to describe the symptom and identify what may actually be causing it.

Are a Herniated Disc and Radiculopathy the Same Thing?

No.

A herniated disc is one possible cause.

Radiculopathy is the clinical consequence of impaired nerve root function.

A patient may therefore have a herniated disc visible on an MRI scan without experiencing significant radiculopathy.

Likewise, the presence of a herniated disc does not automatically mean that surgery is necessary.

I discuss this in more detail in the article “Herniated Disc: When Is Surgery Necessary? The Value of a Second Neurosurgical Opinion”.

I HAVE A HERNIATED DISC AND A COMPRESSED NERVE ROOT: DO I NEED SURGERY? Not necessarily. The decision depends on the symptoms, the neurological examination, whether the symptoms correlate with the imaging findings, how they evolve over time, and the response to conservative treatment.

Can Stenosis Also Cause Radiculopathy?

Yes.

A nerve root may also become compressed because the space through which it passes has gradually narrowed.

In these cases, stenosis may be present.

The narrowing may affect the spinal canal or the lateral recesses and neural foramina through which the nerve roots pass.

However, the same principle applies:

stenosis seen on imaging must be correlated with the patient’s symptoms.

An MRI scan may show marked narrowing in someone with relatively mild symptoms, while apparently less pronounced changes may be seen in a patient with significant clinical findings.

This is why, when terms such as “narrow spinal canal” or “stenosis” appear in a radiology report, their significance must always be understood in the context of the individual patient.

What If the Problem Is in the Cervical Spine?

Radiculopathy can also affect the cervical spine.

In this case, symptoms may radiate from the neck into the shoulder, arm, hand or specific fingers.

These may include pain, tingling, altered sensation or muscle weakness.

In the cervical spine, however, there is another particularly important distinction.

Compression of a nerve root is one thing. Compression of the spinal cord is another.

When the spinal cord is involved, different symptoms may develop, including difficulty with fine hand movements, loss of strength, dropping objects more frequently or changes in walking and balance.

I discuss these warning signs in more detail in the article “When Your Hands Begin to Lose Strength: A Cervical Spine Warning Sign That Should Not Be Overlooked”.

This distinction matters because radiculopathy and myelopathy are not the same condition.

And cervical myelopathy will be one of the medical terms we explore in a forthcoming article in this series.

When Do Symptoms Require Greater Attention?

Pain can be very severe without necessarily indicating serious neurological damage.

However, some warning signs require particular attention.

These include:

• new or progressive muscle weakness;

• persistent or worsening changes in sensation;

• difficulty performing certain movements;

• changes in walking or balance;

• progressive worsening of neurological symptoms.

In these situations, it is important to understand which neurological structure is involved and why.

If the question is when a spinal symptom should prompt specialist assessment, I also discuss this in “When Is It Time to See a Spinal Neurosurgeon?”.

WHEN DOES RADICULOPATHY REQUIRE SPECIALIST ASSESSMENT? When symptoms persist or worsen, or when pain is accompanied by muscle weakness, altered sensation or other neurological deficits, specialist assessment may be appropriate to determine the underlying cause and the extent of nerve root involvement.

The MRI Shows Compression: Does That Mean We Have Found the Cause?

Not necessarily.

This is one of the principles I consider most important when assessing a patient with a spinal condition.

An MRI scan may show a herniated disc, a disc protrusion, stenosis or contact with a nerve root.

But imaging alone does not tell us what the patient is actually experiencing.

We need to understand:

• where the pain is felt;

• where the pain radiates;

• whether tingling is present;

• whether there are changes in sensation;

• whether muscle strength is preserved;

• whether reflexes are altered;

• whether the imaging findings correlate with the neurological picture.

In other words:

we do not treat an MRI scan. We treat a patient.

This principle is also central when deciding whether surgery is necessary and, importantly, which procedure is appropriate.

Does Radiculopathy Always Require Surgery?

No.

Many cases of radiculopathy can initially be managed conservatively and may improve without surgery.

The decision to consider surgery is based on the clinical picture as a whole: the cause of the compression, the severity and duration of symptoms, the presence of any neurological deficits, how the condition evolves over time, and the response to treatments already undertaken.

When surgery is indicated, a further question needs to be addressed:

what is the most appropriate way to treat that specific compression?

There is no single surgical technique that should automatically be applied to every patient.

The surgical strategy should be tailored to the underlying condition, the patient’s anatomy, the neurological structures involved and the objective of the procedure.

This is the same principle I explore in my article on how to choose the most appropriate procedure in spinal neurosurgery.

The term minimally invasive can also create expectations that need to be put into context. A less invasive approach can offer important advantages when appropriately indicated, but it is not automatically the best option for every spinal condition. I discuss this further in “Minimally Invasive Surgery Does Not Always Mean Better: What Every Patient Should Know”.

What If I Have Already Been Offered Surgery?

When surgery has already been recommended, understanding the diagnosis clearly becomes even more important.

Patients should be able to understand:

which structure is involved?

what is causing the symptoms?

what is the aim of the surgery?

why has that particular surgical technique been recommended?

In complex cases, or when there are still questions about the diagnosis, the proposed surgical strategy or possible alternatives, it may be helpful to seek a Second Opinion in spinal neurosurgery.

A second opinion does not necessarily mean questioning the original recommendation.

It means having the information needed to better understand the condition and the proposed strategy for treating it.

What Does It Mean? Patients’ Questions

Does radiculopathy mean a “pinched nerve”?

“Pinched nerve” is a common expression that can be used as an intuitive way of describing nerve compression. Radiculopathy, however, is the medical term used when a nerve root is affected in a way that causes clinical symptoms or neurological signs.

Are nerve root compression and radiculopathy the same thing?

Not exactly. Nerve root compression describes the anatomical relationship between a structure and a nerve root. Radiculopathy refers to impaired nerve root function and may cause pain, tingling, altered sensation or muscle weakness.

Can a herniated disc cause radiculopathy?

Yes. A herniated disc may compress or irritate a nerve root, but the presence of a disc herniation on imaging does not automatically mean that it is responsible for the patient’s symptoms.

Can stenosis also cause radiculopathy?

Yes. A reduction in the space available to a nerve root may cause compression and, in some cases, lead to radiculopathy.

Is sciatica a radiculopathy?

Not necessarily. Sciatica describes pain that radiates along the distribution of the sciatic nerve. Lumbar radiculopathy may be one of its causes, but the clinical picture needs to be assessed to establish the origin of the symptoms.

Can radiculopathy also affect the neck?

Yes. Cervical radiculopathy may cause symptoms that radiate from the neck into the shoulder, arm, hand or fingers. However, it is important to distinguish nerve root involvement from possible spinal cord involvement.

Does radiculopathy require surgery?

No. Many cases of radiculopathy can be managed conservatively. Surgery is considered when there is a specific clinical and neurological indication.

If an MRI shows a compressed nerve, does that mean it is definitely causing my symptoms?

No. Imaging findings must be correlated with the patient’s symptoms and neurological examination. Compression seen on imaging is not necessarily responsible for the symptoms the patient is experiencing.

Fabio Tresoldi - Senior Consultant Neurospine Surgeon