Prostate Surgery and Penis Size Reduction: The Complete Guide to Prostate Removal, Penile Shrinkage, and Changes in Male Sexual Anatomy
How Much Penis Size Can Men Lose After Prostate Surgery? Why Does It Happen? Can the Lost Length Be Recovered? And Are There Reasons Other Than Cancer to Remove the Prostate?
Prostate surgery can be a life-changing experience for men, affecting far more than their urinary health. Depending on the procedure, men may experience changes in erectile function, ejaculation, orgasm, urinary control, and even the physical size and appearance of their penis.
One of the lesser-discussed consequences of prostate removal is penile shortening, a documented complication that can occur following a radical prostatectomy, the surgical removal of the entire prostate gland.
Some men notice very little change, while others report a visible reduction in penile length. For men who already have relatively small penises, even a modest reduction can be significant.
This raises several important questions:
- How much penis length is typically lost after prostate removal?
- Does every man experience penile shrinkage?
- Does the penis become smaller permanently?
- Why does removing the prostate affect penile length when the prostate is located inside the pelvis?
- Can prostate surgery also affect penile girth?
- Can penile rehabilitation restore lost length?
- Are there medical reasons to remove the prostate other than prostate cancer?
- Can a man elect to have his prostate removed for personal reasons?
Understanding the answers requires examining the prostate’s anatomy, the different types of prostate surgery, and the relationship between prostate removal, erectile function, and penile health.
This comprehensive guide explores these subjects, including what scientific studies have discovered about penile shortening and what men should understand before considering prostate surgery.
1. Understanding the Prostate and Its Role in the Male Body
The prostate is a small gland located beneath the bladder and in front of the rectum. In younger adult men, it is generally about the size of a walnut, although it frequently enlarges with age.
The prostate surrounds the first portion of the urethra, the tube that carries urine from the bladder through the penis.
Its primary reproductive function is to produce fluid that becomes part of semen.
The prostate also contains smooth muscle that helps move seminal fluid during ejaculation.
Although the prostate plays an important role in reproduction and ejaculation, it is not responsible for producing testosterone. Testosterone is primarily produced by the testicles.
Consequently, removing the prostate does not ordinarily eliminate testosterone production, cause the testicles to stop functioning, or directly produce the hormonal effects associated with castration.
However, removing the prostate can substantially change male sexual function.
What happens when the prostate is removed?
Following complete prostate removal:
- The prostate no longer produces seminal fluid.
- Ejaculation becomes dry because the prostate and seminal vesicles are removed and the normal semen pathway is interrupted.
- Orgasms may still occur, although they can feel different.
- Erections may become weaker, less frequent, or impossible without treatment.
- Urinary leakage may occur, particularly during recovery.
- Some men experience measurable penile shortening.
It is important to distinguish between changes caused directly by the operation and those resulting from erectile dysfunction during recovery.
Both can influence the penis’s appearance and dimensions.
2. What Is a Radical Prostatectomy?
A radical prostatectomy is an operation in which the surgeon removes the entire prostate gland, usually along with the seminal vesicles.
The bladder is then surgically reconnected to the remaining urethra.
This operation is most commonly performed to treat prostate cancer that is believed to be confined to the prostate or nearby tissues and is suitable for surgical treatment.
There are several surgical approaches.
Robotic-assisted radical prostatectomy
Robotic-assisted surgery is widely used in modern prostate cancer treatment.
The surgeon controls robotic instruments through several small abdominal incisions.
The technology allows precise movements and visualization of delicate structures surrounding the prostate.
However, robotic surgery does not eliminate the possibility of erectile dysfunction, urinary complications, or penile shortening.
Open radical prostatectomy
Open surgery involves a larger incision, usually in the lower abdomen.
Although robotic procedures have become common, open prostatectomy remains appropriate in selected situations.
Penile shortening can occur following either approach.
Nerve-sparing radical prostatectomy
The nerves responsible for erections run in bundles alongside the prostate.
When medically appropriate, surgeons attempt to preserve these nerves.
Nerve-sparing surgery can improve the chances of recovering erections, but it does not guarantee normal erectile function.
The possibility of preserving these nerves depends on factors including cancer location, disease extent, and the patient’s existing erectile function.
Important distinction: A nerve-sparing prostatectomy may reduce the risk of erectile dysfunction and associated penile tissue changes, but it cannot guarantee preservation of penile length.
3. How Much Penis Length Is Typically Lost After Prostate Removal?
This is one of the most important questions men ask about radical prostatectomy.
Research has documented measurable changes in penile length after surgery, although the amount varies considerably.
Studies use different measuring techniques, including flaccid length, stretched penile length, and erect length. These measurements are not interchangeable.
Some studies have reported average reductions of approximately 1–2 centimeters (0.4–0.8 inches) during the early postoperative period.
Other studies have found smaller average changes, and some men experience no measurable shortening.
The evidence does not establish that every man permanently loses a particular amount of penile length.
Understanding the numbers
A reduction of one centimeter equals approximately 0.39 inches.
A reduction of two centimeters equals approximately 0.79 inches.
For perspective, consider a man whose measured erect penis length before surgery was six inches.
A reduction of half an inch would leave an erect length of approximately 5.5 inches.
For a man starting with an erect length of four inches, the same half-inch reduction represents a larger percentage of his original length.
However, these are mathematical illustrations, not predictions of what will happen to an individual patient.
Does the penis always become shorter?
No.
Some men experience measurable shortening, some experience temporary changes, and others maintain approximately their original dimensions.
Factors influencing the outcome may include:
- Erectile function before surgery.
- Whether erection-related nerves can be preserved.
- Age and overall vascular health.
- The duration and severity of postoperative erectile dysfunction.
- Surgical technique and postoperative anatomy.
- Development of penile tissue fibrosis.
- The timing and method of penile measurements.
- Recovery of spontaneous erections.
A man who maintains or recovers healthy erections may have a different long-term outcome from someone who experiences prolonged erectile dysfunction.
Importantly, researchers have observed that penile length may partially recover over time.
The amount of recovery is highly individual.
4. What Medical Studies Reveal About Penile Shrinkage
Several clinical studies provide valuable information about how much penile shortening occurs and whether the change is permanent.
Study One: Average shortening of 1–2 centimeters
The National Cancer Institute recognizes penile shortening as a possible complication of radical prostatectomy.
Its review of clinical studies reports average reductions of approximately 1–2 centimeters, equivalent to about 0.4–0.8 inches.
However, these averages do not mean that most men experience exactly that amount of shortening. Cancer.gov
Study Two: Some men lose considerably more
An early study involving 31 men undergoing radical prostatectomy found that 22 men, or approximately 71%, had measurable reductions in stretched penile length three months after surgery.
The findings included:
- Seven men lost approximately 0.5 centimeters.
- Eleven men lost between 1 and 2 centimeters.
- Four men lost more than 2 centimeters.
- Five men experienced no change.
- Four men actually had longer measured lengths after surgery.
The greatest reported reduction was 4 centimeters, approximately 1.57 inches.
This demonstrates that substantial shortening is possible, although this was a small study and its results should not be assumed to represent all prostatectomy patients. PubMed
Study Three: Penile length may recover over several years
A prospective study of 105 men examined penile length following radical prostatectomy.
Researchers observed an average reduction of approximately one centimeter at three months.
That reduction persisted through the first two years, but measurements gradually approached their original values during subsequent follow-up.
By 48 months, the average difference from preoperative length was no longer statistically significant.
However, relatively few participants remained in the study at its longest follow-up intervals, so the results do not establish that every man will recover his original length.
Men who recovered erectile function tended to experience better penile length recovery. PubMed
Study Four: Approximately 60% recovered their original length within one year
A larger study examining penile length recovery after radical prostatectomy found that approximately 60% of evaluated patients had regained their preoperative stretched penile length at 12 months.
The researchers identified several factors associated with recovery, including younger age, better erectile function before surgery, and consistent use of certain erectile dysfunction medications.
Among men who had not recovered their original length, the average reduction at 12 months was approximately 2.35 centimeters, or 0.93 inches.
This is an important distinction: the 2.35-centimeter reduction applied to the subgroup with incomplete recovery, not to all patients.
The study also illustrates why individual outcomes can differ substantially from overall averages. PubMed
What do these studies mean for the average man?
The most reasonable conclusion is that penile shortening is a recognized risk of radical prostatectomy.
An average early reduction of approximately 0.4–0.8 inches has been reported in some studies, but smaller changes, larger changes, no change, and subsequent recovery are all possible.
There is no scientifically established amount of permanent penile shortening that can be predicted for every patient.
5. Why Does Removing the Prostate Make the Penis Shorter?
At first glance, this seems surprising.
The prostate is inside the pelvis, while most of the visible penis is outside the body.
How can removing an internal gland affect the length of an external organ?
Researchers believe several mechanisms may contribute.
Changes in pelvic anatomy
During radical prostatectomy, the prostate and the portion of the urethra running through it are removed.
The surgeon reconnects the bladder neck to the remaining urethra.
This reconstruction changes the relationship between the bladder, urethra, and surrounding pelvic structures.
Some researchers believe these changes can temporarily alter how much penile tissue extends externally.
However, it is an oversimplification to say that removing a prostate of a particular size automatically shortens the penis by an equivalent amount.
Damage or temporary dysfunction of erectile nerves
The nerves responsible for erections are located close to the prostate.
Even when surgeons preserve these nerves, they may experience temporary injury or reduced function.
This can interfere with normal erections for months or longer.
Reduced oxygenation of penile tissue
Regular erections help maintain the health of erectile tissue.
When erections become infrequent or disappear following surgery, the erectile tissue may experience changes in oxygenation.
Prolonged erectile dysfunction can contribute to tissue remodeling and fibrosis.
Fibrosis involves the development of less-elastic connective tissue.
Over time, these changes may reduce the ability of the penis to expand fully.
Reduced erectile rigidity
Sometimes a man believes his penis has become significantly smaller when part of the apparent reduction is caused by incomplete erections.
A penis that previously achieved full rigidity may no longer expand to its former dimensions.
This does not necessarily mean the entire difference represents permanent anatomical shortening.
What does the research suggest?
The American Cancer Society identifies changes in postoperative anatomy, nerve injury, and reduced blood flow as possible contributors to penile shortening.
The exact mechanism remains incompletely understood. American Cancer Society
6. Can Prostate Removal Reduce Penile Girth?
Most clinical research focuses on penile length rather than circumference.
Nevertheless, some men report that their penis appears thinner following surgery.
This may be related to changes in erectile function.
A healthy erection involves increased blood flow into the erectile chambers, allowing the penis to expand in both length and circumference.
If erectile rigidity decreases, the penis may not achieve its previous girth.
Prolonged erectile dysfunction can also contribute to changes in erectile tissue.
However, there is insufficient evidence to establish a reliable average amount of permanent penile girth reduction after radical prostatectomy.
A man who experiences a thinner appearance after surgery should not automatically assume that the change is permanent.
Improving erectile function may improve the penis’s dimensions during erections.
7. Does Prostate Surgery Affect Men With Naturally Small Penises Differently?
Men with naturally small penises may be particularly concerned about possible shortening following prostate surgery.
Consider two hypothetical patients.
The first has a preoperative erect length of six inches.
The second has a preoperative erect length of three inches.
If both experience a reduction of half an inch, the first loses approximately 8% of his original length, while the second loses approximately 17%.
The same absolute reduction therefore represents a much larger proportional change for the second man.
However, this does not establish that men with smaller penises are biologically more likely to experience shortening.
There is no reliable evidence that naturally small penile size, by itself, predicts a greater risk of postoperative length loss.
Can a small penis become a micropenis after surgery?
A micropenis is a medical diagnosis based on stretched penile length relative to established age-specific norms.
An adult who experiences significant postoperative shortening may fall below a particular measurement threshold.
However, acquired shortening after surgery is not necessarily classified as congenital micropenis.
The distinction matters because the underlying causes and treatment options differ.
Psychological and body-image considerations
Penile size can be an important aspect of how men perceive their bodies.
Some men are deeply concerned about losing length.
Others are less concerned with size but worry about erectile function, urinary control, or sexual satisfaction.
There is no single correct emotional response to these changes.
Men considering prostate surgery should be informed about the possibility of penile shortening before the procedure rather than discovering it afterward.
8. Is Penile Shortening Permanent?
Not necessarily.
Research suggests that penile shortening can be temporary, partially reversible, or persistent.
The recovery process varies.
First three months
Some studies have found that penile length decreases most noticeably immediately after surgery or during the first several postoperative months.
Swelling, changes in pelvic anatomy, reduced erections, and postoperative healing may all contribute.
Three to twelve months
During this period, some men begin recovering erectile function.
Penile dimensions may improve as erections return and postoperative tissues recover.
Other men continue experiencing significant erectile dysfunction.
One to two years
Further recovery can occur.
Men who have undergone nerve-sparing surgery may continue recovering erectile function over an extended period.
Beyond two years
Some studies have documented improvements in penile length several years after surgery.
Nevertheless, recovery is not guaranteed.
Men with persistent erectile dysfunction or significant tissue changes may experience lasting shortening.
The important message is that penile length measured shortly after prostate surgery should not automatically be considered the patient’s permanent final length.
9. Can Penile Rehabilitation Prevent or Reverse Shrinkage?
Penile rehabilitation refers to treatments intended to preserve erectile tissue health and support sexual recovery following prostate surgery.
A urologist may recommend a rehabilitation program based on the patient’s health, surgical outcome, and goals.
Erectile dysfunction medications
Medications such as sildenafil and tadalafil increase the effects of nitric oxide signaling, helping improve blood flow during sexual stimulation.
These medications may assist some men in obtaining erections after prostate surgery.
Observational research has associated consistent use of these medications with improved penile length recovery.
However, clinical evidence does not conclusively establish that routine medication use prevents permanent shortening or restores natural erections in every patient.
Vacuum erection devices
A vacuum erection device uses negative pressure to draw blood into the penis.
These devices may help produce erections when natural erectile function is impaired.
Some rehabilitation programs use them to help maintain penile tissue expansion.
Evidence suggests potential benefits for penile length preservation in selected patients, although the quality and consistency of the research vary.
Penile injections
Intracavernosal injections deliver medication directly into erectile tissue.
They can produce erections even when nerve-related erectile function has been significantly impaired.
These treatments are generally prescribed and supervised by a urologist.
Penile traction therapy
Penile traction devices apply controlled, sustained tension.
Some studies have investigated traction therapy following prostatectomy.
Results suggest that certain patients may benefit, but traction is not a guaranteed method of recovering lost length.
Improper use can cause injury.
Penile implants
For men with persistent erectile dysfunction that does not respond adequately to other treatments, a penile prosthesis may be considered.
An implant can restore the ability to achieve sufficient rigidity for sexual activity.
However, an implant does not guarantee restoration of the penis’s original dimensions.
When should rehabilitation begin?
Patients should discuss penile rehabilitation before surgery or during early postoperative follow-up.
Treatment should begin only when the surgical team determines it is safe.
Early intervention may be appropriate for some men, but individual medical circumstances matter.
10. Are There Reasons Other Than Prostate Cancer to Remove the Prostate?
Yes. There are several noncancerous conditions that may require prostate surgery. However, most of these operations remove only part of the prostate rather than the entire gland.
This distinction is especially important when discussing penile shortening.
The extensive research documenting penile length reduction primarily concerns radical prostatectomy, the complete removal of the prostate.
Men undergoing surgery for noncancerous prostate enlargement generally receive different procedures.
Reason One: Benign Prostatic Hyperplasia (BPH)
Benign prostatic hyperplasia, commonly called BPH, is one of the most common prostate conditions affecting older men.
As men age, the prostate frequently enlarges.
Because the prostate surrounds the urethra, enlargement can interfere with urination.
Symptoms may include:
- Frequent urination, especially at night.
- Difficulty starting urination.
- Weak urinary stream.
- Feeling that the bladder never empties completely.
- Urinary urgency.
- Intermittent urinary flow.
- Complete urinary retention in severe cases.
For many men, medications provide sufficient relief.
Others eventually require surgery.
What kind of surgery is performed for BPH?
Several procedures are available.
Transurethral resection of the prostate (TURP) removes obstructing prostate tissue through the urethra.
Holmium laser enucleation of the prostate (HoLEP) uses a laser to separate and remove enlarged internal prostate tissue.
Simple prostatectomy removes the enlarged inner portion of the prostate while preserving the outer prostate tissue.
Simple prostatectomy is generally reserved for substantially enlarged glands, although treatment selection depends on anatomy, symptoms, and surgeon expertise.
Unlike radical prostatectomy, these operations do not normally involve removing the entire prostate and seminal vesicles.
Consequently, the penile shortening statistics associated with radical prostatectomy should not be applied automatically to BPH surgery.
The American Urological Association’s 2026 guideline emphasizes selecting procedures according to individual patient characteristics and discussing their different sexual side effects. PubMed
11. Reason Two: Severe Urinary Retention
Some men develop urinary retention so severe that they cannot empty their bladder normally.
This can occur when an enlarged prostate obstructs the urethra.
Untreated urinary retention can lead to serious complications, including bladder damage, urinary infections, and kidney problems.
When medications and less-invasive treatments are insufficient, surgery may become necessary.
In these circumstances, the objective is to remove the obstruction and restore urinary function.
A TURP, HoLEP, or simple prostatectomy may be recommended.
Complete radical prostate removal is not ordinarily necessary for benign urinary obstruction.
Does this surgery cause penile shortening?
Significant penile shortening is not an established typical consequence of these procedures.
Nevertheless, some men may experience changes in ejaculation, erectile function, or sexual satisfaction.
The risk depends on the particular procedure and the patient’s health.
12. Reason Three: Chronic Prostatitis and Severe Prostate Pain
Prostatitis refers to inflammation of the prostate.
Some forms are caused by bacterial infections, while others involve chronic pelvic pain without an identifiable ongoing infection.
Symptoms may include pelvic discomfort, painful urination, pain during ejaculation, and persistent genital or perineal discomfort.
Can chronic prostatitis lead to prostate removal?
In extremely unusual circumstances, surgery may be considered for severe, treatment-resistant prostate disease.
However, radical prostatectomy is not an established routine treatment for chronic prostatitis or chronic pelvic pain syndrome.
Removing the prostate does not guarantee that pelvic pain will disappear.
Pain can originate from pelvic muscles, nerves, the bladder, and other structures.
For this reason, a man with chronic prostatitis should generally receive a comprehensive evaluation and appropriate nonsurgical treatment before any consideration of major surgery.
13. Reason Four: Recurrent Prostate Abscesses or Serious Infections
A prostate abscess is a collection of infected material within the gland.
Although uncommon, it can become a serious medical problem.
Treatment generally involves antibiotics and, when necessary, drainage of the abscess.
Some abscesses can be drained through the urethra or by other minimally invasive methods.
Extensive surgery may occasionally be necessary when severe infection or tissue destruction cannot be managed through conventional treatment.
However, complete prostate removal for infection is exceptionally rare.
It is not the standard approach to treating ordinary urinary infections or prostatitis.
14. Reason Five: Severe Bleeding or Other Complications of Prostate Enlargement
Occasionally, men with enlarged prostates experience persistent or recurrent bleeding.
Other complications can include bladder stones, recurrent urinary tract infections, and kidney impairment caused by urinary obstruction.
When these complications are directly related to BPH, surgery may be recommended.
The American Urological Association identifies several such complications as potential indications for surgical treatment.
Again, the operation is usually designed to remove obstructing prostate tissue rather than the entire gland. AUA Journals
15. Reason Six: Bladder Cancer Requiring Removal of the Bladder and Prostate
One important non-prostate-cancer reason for complete prostate removal is bladder cancer.
Some men with invasive bladder cancer require a radical cystoprostatectomy.
This procedure removes the bladder and prostate, often along with the seminal vesicles.
The operation is performed because of bladder cancer, not necessarily because the prostate itself contains cancer.
It can produce major changes in urinary and sexual function.
Erectile dysfunction is an important risk, and postoperative changes in penile appearance or dimensions may occur.
However, the penile shortening statistics from studies of isolated radical prostatectomy cannot be directly transferred to men undergoing cystoprostatectomy.
16. Can a Healthy Man Elect to Have His Prostate Removed?
This is an interesting question because not every man values the reproductive or sexual functions of the prostate in the same way.
Some men are concerned about future prostate disease.
Others may dislike ejaculation, experience distress related to aspects of their male anatomy, or have personal reasons for wanting the prostate removed.
But can a man simply request removal of a healthy prostate?
Is elective prostate removal medically available?
Radical prostatectomy is a major operation with potentially permanent consequences.
For a healthy man without prostate cancer or another compelling medical indication, elective removal is not an accepted standard procedure.
Surgeons generally avoid removing healthy organs when the potential risks outweigh the anticipated benefits.
Potential complications include urinary incontinence, erectile dysfunction, infertility, infection, bleeding, and urethral scarring.
A patient may request a consultation, but a surgeon is not obligated to perform a procedure that lacks a medically appropriate indication.
What if a man wants a smaller penis?
Some men prefer the appearance of smaller genitalia.
This preference may be related to personal aesthetics, body image, gender expression, or other individual considerations.
However, radical prostatectomy is not a recognized or medically appropriate method of elective penis reduction.
The amount of penile shortening is unpredictable, and the operation carries serious risks.
It would be inappropriate to recommend prostate removal solely to achieve a smaller penis.
A man interested in genital size reduction should instead consult a qualified urologist familiar with reconstructive surgery and, where relevant, gender-affirming care.
The objective should be to understand the person’s goals and explore safer, evidence-based options.
17. Does Removing the Prostate Reduce Testosterone or Make a Man More Feminine?
No. Prostate removal does not ordinarily reduce testosterone production to castration levels.
This is a common misconception.
The prostate is influenced by testosterone, but it is not the body’s primary source of testosterone.
The testicles continue producing testosterone after prostate removal.
Consequently, a radical prostatectomy does not normally cause:
- Breast development.
- Redistribution of body fat into a typically feminine pattern.
- Major loss of facial hair.
- A female hormonal profile.
- The hormonal effects associated with removal of the testicles.
Some men may experience changes in sexual desire or performance following surgery, but these are not equivalent to the effects of estrogen therapy or testosterone suppression.
What about penile shrinkage and feminization?
A smaller or less prominent penis does not necessarily indicate hormonal feminization.
Penile shortening after prostatectomy is primarily associated with surgical, anatomical, vascular, and erectile-function changes.
It should not be confused with the effects of gender-affirming hormone treatment.
For men exploring a more feminine or gender-neutral genital appearance, prostate removal is not an appropriate substitute for established gender-affirming treatments.
18. Does Prostate Removal Affect Orgasm and Ejaculation?
Yes, and these changes can be more significant than the reduction in penile length.
Ejaculation after radical prostatectomy
During radical prostatectomy, the prostate and seminal vesicles are removed.
The normal pathway that carries sperm into the urethra is also interrupted.
As a result, men who undergo radical prostatectomy no longer ejaculate semen.
This is commonly described as a dry orgasm.
Can men still experience orgasms?
Yes.
The physical sensation of orgasm does not depend entirely on ejaculation.
Many men retain the ability to experience orgasms after prostate removal.
However, the sensations may change.
Some men report orgasms that feel different from those experienced before surgery.
Others experience difficulty achieving orgasm, particularly when erectile dysfunction is present.
Some also experience urinary leakage during sexual arousal or orgasm, known as climacturia.
Does prostate removal eliminate sexual pleasure?
Not necessarily.
Men can continue enjoying sexual intimacy after radical prostatectomy.
However, the recovery process may involve adapting to changes in erections, ejaculation, and sexual sensation.
Treatment for erectile dysfunction and sexual rehabilitation can be important parts of recovery.
19. Can Men Still Have Erections After Their Prostate Is Removed?
Yes, although erectile dysfunction is one of the most significant potential complications.
The outcome depends on several factors.
These include age, erectile function before surgery, general health, and whether the nerves responsible for erections can be preserved.
Some men recover spontaneous erections within months.
Others require medication or medical devices.
Some experience permanent erectile dysfunction.
Nerve-sparing surgery
When cancer characteristics allow, surgeons may preserve the nerves involved in erectile function.
This improves the chances of postoperative recovery.
Nevertheless, even carefully performed nerve-sparing surgery can result in temporary or permanent erectile dysfunction.
What if the erectile nerves cannot be preserved?
When cancer involves tissue close to the erectile nerves, removing one or both nerve bundles may be necessary.
This substantially increases the likelihood of significant erectile dysfunction.
Men in this situation may still achieve erections using injections, vacuum devices, or penile implants.
Why does this matter for penile length?
Recovery of erectile function is associated with better preservation and recovery of penile dimensions.
This is one reason sexual rehabilitation deserves attention after prostate surgery.
20. Prostate Surgery and Penis Size: Comparing Different Procedures
Not every prostate operation has the same effect on penile anatomy.
| Procedure | Prostate tissue removed | Main reason | Penile shortening |
|---|---|---|---|
| Radical prostatectomy | Entire prostate and usually seminal vesicles | Prostate cancer | Documented risk; some studies report average reductions of 1–2 cm |
| Robotic radical prostatectomy | Entire prostate and usually seminal vesicles | Prostate cancer | Documented risk |
| Nerve-sparing radical prostatectomy | Entire prostate while attempting to preserve erectile nerves | Prostate cancer | Possible; nerve preservation may improve recovery |
| Simple prostatectomy | Enlarged inner prostate tissue | Severe BPH | No established average comparable to radical prostatectomy |
| TURP | Obstructing internal tissue | BPH | Significant shortening is not a typical established complication |
| HoLEP | Enlarged internal tissue | BPH | Significant shortening is not a typical established complication |
| Radical cystoprostatectomy | Bladder, prostate, and associated structures | Bladder cancer | Sexual and anatomical changes possible; specific shortening estimates differ |
The distinction between radical and simple prostatectomy is essential.
A man undergoing surgery for an enlarged prostate should not assume he faces the same penile shortening risk as someone undergoing complete prostate removal for cancer.
21. What Should Men Ask Their Urologist Before Prostate Surgery?
Men considering prostate surgery should have a detailed conversation about possible changes in sexual function and penile dimensions.
Questions worth asking include:
- Is complete prostate removal necessary, or are less-invasive alternatives available?
- Am I a candidate for nerve-sparing surgery?
- What is my individual risk of erectile dysfunction?
- How likely am I to experience measurable penile shortening?
- Can we document my preoperative penile length?
- Should I begin a penile rehabilitation program after surgery?
- Would erectile dysfunction medication or a vacuum device be appropriate?
- How long might erectile function take to recover?
- Will I still be able to experience orgasms?
- What changes in urinary control should I expect?
- What are the alternatives to surgery?
- How do my age and existing health conditions affect my expected recovery?
Men with prostate cancer should also discuss whether active surveillance, radiation therapy, or another treatment approach is appropriate for their particular diagnosis.
Not every prostate cancer requires immediate surgery.
Frequently Asked Questions About Prostate Removal and Penis Shrinkage
How much does the average penis shrink after prostate removal?
Some clinical studies report average reductions of approximately 1–2 centimeters, equivalent to 0.4–0.8 inches, following radical prostatectomy.
However, results vary substantially, and some studies report smaller changes or recovery to baseline measurements.
Can a man lose an entire inch after prostate surgery?
Yes. Reductions of an inch or more have been documented in some patients.
However, this is not the expected outcome for every man.
Can prostate removal make a penis permanently smaller?
Yes, permanent shortening is possible.
However, some men recover part or all of their original measured length during the months or years following surgery.
Does robotic prostate surgery prevent penis shrinkage?
No.
Robotic surgery may offer technical advantages, but it does not eliminate the risk of penile shortening or erectile dysfunction.
Is penile shortening more common in older men?
Age can influence erectile recovery and postoperative outcomes.
Older men may have a greater risk of persistent erectile dysfunction, but age alone cannot predict how much penile shortening an individual will experience.
Does prostate removal make the penis thinner?
Some men report reduced penile girth, particularly when erectile function is impaired.
However, reliable data establishing an average permanent girth reduction are limited.
Can erectile dysfunction medications restore lost length?
They may help some men achieve better erections, and certain studies associate their use with improved penile length preservation.
However, they do not guarantee restoration of original penile dimensions.
Can men still have sex after prostate removal?
Yes.
Many men resume satisfying sexual activity after surgery, although some require treatment for erectile dysfunction.
Does prostate removal eliminate ejaculation?
Complete radical prostatectomy eliminates normal semen ejaculation.
Men may still experience orgasms without releasing semen.
Can prostate removal cure an enlarged prostate?
A simple prostatectomy or another BPH procedure can provide substantial, long-lasting relief from urinary obstruction.
However, a simple prostatectomy does not remove the entire gland, and some urinary symptoms may persist for other reasons.
Is prostate cancer the only reason for complete prostate removal?
No.
Complete prostate removal may also occur during surgery for certain bladder cancers.
Other noncancerous conditions occasionally require extensive prostate surgery, but complete radical removal is unusual.
Can a man request prostate removal to make his penis smaller?
A man can discuss his wishes with a physician, but radical prostatectomy is not an accepted elective penis-reduction procedure.
Its complications are too significant and its effects on penile size too unpredictable to justify it solely for cosmetic reduction.
Does prostate removal make a man less masculine?
No.
Removing the prostate does not change a person’s gender identity or ordinarily eliminate testosterone production.
Changes in erections, ejaculation, or penile dimensions do not determine masculinity.
Can a man live a normal life without a prostate?
Yes.
Many men live long, active lives following prostate removal.
However, urinary and sexual side effects can affect quality of life, and some men require ongoing treatment.
Final Thoughts: Understanding Prostate Removal and Penile Size Changes
Prostate surgery has helped countless men manage prostate cancer, severe urinary obstruction, and other serious medical conditions.
However, the potential consequences deserve careful consideration.
One consequence that men are not always aware of is penile shortening following radical prostatectomy.
Clinical research confirms that this can occur, with some studies documenting average reductions of approximately 1–2 centimeters.
For a man with an average-sized penis, this may represent a noticeable change.
For someone who already has a relatively small penis, the same reduction can represent a substantial percentage of his original length.
Fortunately, penile shortening is not inevitable, and it is not always permanent.
Some men recover their original measured length as healing progresses and erectile function improves.
Others experience persistent changes.
The operation performed also matters enormously.
Most prostate surgery for noncancerous enlargement does not involve removing the entire prostate and should not be confused with radical prostatectomy.
Although complete prostate removal is most commonly associated with prostate cancer, other medical circumstances, particularly certain bladder cancers, can also require it.
The most important consideration is choosing the appropriate treatment for the underlying medical condition rather than viewing prostate removal as a method of intentionally reducing penile size.
Men facing prostate surgery should be encouraged to discuss penile length, erectile function, ejaculation, and urinary control openly with their urologist.
These are legitimate medical concerns that deserve thoughtful answers.
With proper counseling, realistic expectations, and appropriate postoperative care, men can make informed decisions about protecting both their health and their quality of life.
Medical Research and Additional Reading
For readers interested in the clinical evidence, the following resources provide additional information:
National Cancer Institute — Prostate Cancer Treatment
NCI: Prostate Cancer Treatment and Surgical Complications
Discusses radical prostatectomy, erectile dysfunction, urinary complications, and documented penile shortening.
American Cancer Society — Surgery for Prostate Cancer
American Cancer Society: Prostate Surgery
Explains surgical approaches and possible postoperative changes in penile length.
Long-Term Study of Penile Length Following Radical Prostatectomy
PubMed: The Natural History of Penile Length After Radical Prostatectomy
Examines penile length changes and recovery over extended postoperative follow-up.
Penile Length Recovery Following Prostate Surgery
PubMed: Longitudinal Recovery Patterns of Penile Length
Investigates the relationship between penile length recovery, erectile function, age, and erectile dysfunction medications.
National Institute of Diabetes and Digestive and Kidney Diseases — Enlarged Prostate
NIDDK: Benign Prostatic Hyperplasia
Explains noncancerous prostate enlargement and the different medical and surgical treatments available.
Medical disclaimer: This article is intended for educational purposes and is not a substitute for individualized medical advice. Anyone considering prostate surgery should consult a qualified urologist about their diagnosis, treatment options, and potential complications.