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Nerve-sparing prostatectomy, explained plainly | CION Cancer Clinics
In a nerve-sparing prostatectomy the surgeon peels the bundles of nerves that control erections away from the prostate and leaves them in place, instead of removing them with the gland. It is offered where the cancer sits away from those nerves. It gives erections a chance to return over the following months, but it is not a promise, and clearing the cancer always comes first. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MI
Medically reviewed by Dr. Mohammed ImaduddinConsultant Surgical Oncologist · MBBS, MS (General Surgery), MCh (Surgical Oncology) · last reviewed September 2026, next review due September 2027
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On this page
- What is a nerve-sparing prostatectomy?
- The different degrees of nerve-sparing
- How the surgeon decides whether the nerves can be kept
- Words you will see, in plain language
- Four things men are told about nerve-sparing, and what is true
- Who nerve-sparing does not suit, and what it cannot promise
- Common questions about nerve-sparing surgery
The short answer
What is a nerve-sparing prostatectomy?
A nerve-sparing prostatectomy is a radical prostatectomy in which the surgeon peels the bundles of nerves that control erections away from the prostate and leaves them in place, instead of removing them with the gland. The prostate still comes out whole. Only the handling of the nerves is different.
Why the nerves are so close to the problem
The two nerve bundles run down the back and sides of the prostate, pressed against its outer layer inside a thin sheet of tissue. They are not inside the gland, but they are so close that removing the prostate without disturbing them takes care and a clear view. Where the cancer sits well inside the gland, the surgeon can lift them off. Where it sits right against the outer layer on that side, peeling the nerves away risks leaving cancer behind.
What it is trying to protect
These nerves carry the signal that lets the penis fill with blood. Keeping them gives erections the chance to return over the months after surgery. It does not promise that they will. Age, the state of erections before the operation and other health problems all shape recovery.
Nerve-sparing is a decision about your cancer first and your erections second. Clearing the cancer always comes first.Not one thing
The different degrees of nerve-sparing
Your operation note will describe which of these was done. They are not simply on or off.
Both sides spared
Both nerve bundles are lifted off and kept. Offered when the cancer sits away from the outer layer on both sides and there is no sign it has grown through. This gives the greatest chance of erections returning.
One side spared
The nerves are kept on the side where the cancer is far from the edge, and removed with the gland on the side where it is close. A common middle path. Recovery of erections is possible, though usually slower and less complete than with both sides.
Partial sparing
On one or both sides the surgeon keeps some of the nerve tissue and takes a wider margin where the cancer is closest. Surgeons describe this in layers, and your note may use those words.
You may see
- Intrafascial: closest to the gland, most nerve kept
- Interfascial: a middle layer
- Extrafascial: wide, nerves removed
Neither side spared
Both bundles are removed with the gland. Chosen when the cancer sits against or through the outer layer on both sides, or is high grade. Erections without help are unlikely afterwards, but implants and other treatments remain possible.
Not sure whether this applies to you?
Ask an oncologistHow it is decided
How the surgeon decides whether the nerves can be kept
Before surgery: the biopsy map
The biopsy reports say which parts of the gland contained cancer, how much, and what grade. Cancer on one side only, and low grade, favours sparing on the other side at least.
Before surgery: the MRI
A prostate MRI shows whether the cancer appears to bulge against or through the outer layer, and on which side. This is the single most useful picture for planning the nerves.
Before surgery: your erections now
The surgeon will ask honestly about erections before the operation, sometimes with a short questionnaire. Where they are already absent, the balance shifts towards a wider margin.
During surgery: what the tissue shows
The plan can change in theatre. If the tissue looks stuck or thickened on one side, the surgeon may take a wider margin there. Some centres send a sliver of tissue for an immediate microscope check while you are still asleep.
After surgery: the report
The final report says whether the edges were clear. It confirms whether the choice made in theatre cleared the cancer, and it guides what, if anything, comes next.
On your operation note
Words you will see, in plain language
- Neurovascular bundle
- The cord of nerves and small blood vessels running down each side of the prostate. There is one on the left and one on the right.
- Bilateral or unilateral
- Bilateral means both bundles were kept. Unilateral means one was kept and one removed with the gland.
- Extracapsular extension
- Cancer that has grown through the outer layer of the prostate. On the side where this is seen, the nerves are usually taken.
- Positive margin
- Cancer cells seen at the cut edge of what was removed. A wider margin lowers this risk; sparing the nerves narrows the margin on that side.
- Frozen section
- A rapid microscope check of a sliver of tissue during the operation, used in some centres to decide whether the nerves can safely stay.
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Commonly believed
Four things men are told about nerve-sparing, and what is true
"If the nerves are spared, erections will be normal."
Sparing gives erections a chance to return, not a promise. The nerves are stretched and bruised even when kept, and take months to recover. Many men need tablets or other help during that time, and some never fully return to how they were.
"Nerve-sparing means the surgeon left cancer behind to save my sex life."
It is only offered where the cancer sits away from the nerves. Where it does not, the nerves are taken. Sparing them on the safe side does not lower the chance of clearing the cancer on the other.
"Erections come back within a few weeks."
Recovery is slow. Improvement often continues for a year or more. Early on, most men have no erections at all, which does not mean the nerves were damaged beyond repair.
"Without nerve-sparing there is no sex life afterwards."
Orgasm and sensation do not depend on these nerves, and men without nerve-sparing can still climax. Injections, vacuum devices and implants can give erections when the nerves are gone.
Did you know
The nerve bundles have almost nothing to do with urine control. That depends on the muscle ring below the prostate and on pelvic floor exercises. A man whose nerves were not spared can still expect his bladder control to recover in the usual way.
Being straight with you
Who nerve-sparing does not suit, and what it cannot promise
Nerve-sparing is not offered where the cancer sits against or through the outer layer on that side, where the grade is high, or where the MRI suggests the cancer is bulging towards the nerves. In those men, taking the nerves is the safer way to clear the cancer, and a good surgeon will say so plainly rather than offer sparing to please you.
When it may make little difference
A man whose erections were already weak or absent before surgery gains less from sparing, because the nerves being kept were not doing much. Diabetes, heart disease and some medicines affect erections on their own. Your surgeon will still try to spare where it is safe, but the honest expectation should be set before the operation.
What this page cannot tell you
It cannot tell you whether your nerves can be kept, or how your own erections will recover. Both depend on your biopsy, your MRI and what the surgeon finds in theatre. Ask your surgeon which degree of sparing they expect for you, and what would change their mind on the day. Ask early about penile rehabilitation, because starting soon after surgery is thought to help.
Questions we are asked
Common questions about nerve-sparing surgery
Does nerve-sparing make the cancer more likely to come back?
Not when it is offered to the right men. It is chosen only where the cancer sits away from the nerves on that side. The final report checks the edges, and if cancer is found there, your team will discuss radiotherapy. Your surgeon should explain why they think sparing is safe in your case.
Can I ask for nerve-sparing?
You can and should raise it, and tell the surgeon honestly how much erections matter to you. The final decision rests on where the cancer sits. A surgeon who spares nerves against the evidence to meet a request is not doing you a favour.
Does the robot make nerve-sparing more likely?
The magnified view helps some surgeons see the nerve layer, but experienced open surgeons spare nerves routinely as well. What decides it is the position of the cancer and the surgeon's skill with the approach they use. Ask how often they spare nerves and what their margin rates are.
How long until erections come back?
Slowly. Most men have none at first. Improvement usually begins over the following months and can continue for a year or more. Tablets, injections or a vacuum device are often started early to keep blood flowing to the tissue while the nerves recover. Ask about this before the operation.
If only one side is spared, is it worth it?
Yes, for many men. One bundle can be enough for erections to return, though recovery is usually slower and may be less complete than with both. It is a reasonable middle path where the cancer is close to the edge on one side only.
Will nerve-sparing help my bladder control too?
Bladder control depends mainly on the muscle ring below the prostate, not on these nerves. Some studies suggest a small benefit from sparing, but pelvic floor exercises before and after surgery matter far more. Men without nerve-sparing recover control in the usual way.
What is a frozen section, and will I have one?
A sliver of tissue from the edge is checked under the microscope while you are still asleep. If cancer is seen, the surgeon widens the margin there. Not every centre does this and not every case needs it. Ask whether your surgeon uses it.
Will I still be able to have children?
Not naturally, whether or not the nerves are spared. The tubes that carry sperm are divided in every radical prostatectomy and there is no semen afterwards. If you may want children, ask about sperm banking before the operation. It cannot be arranged afterwards.
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Sources
- Cancer Research UK — Surgery for prostate cancer
- American Cancer Society — Surgery for prostate cancer
- Macmillan Cancer Support — Prostate cancer
- National Cancer Institute — Prostate cancer treatment (PDQ), patient version
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
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