Removing the prostate can get rid of prostate cancer, but it doesn’t guarantee a cure in every case. At 15 years after surgery, about 82% of men with localized prostate cancer are alive and free of their disease. Whether surgery eliminates the cancer completely depends on how aggressive the tumor is, whether it has spread beyond the prostate, and whether the surgeon can remove all cancerous tissue with clear margins.
When Surgery Works Best
Radical prostatectomy, the operation that removes the entire prostate gland, is most effective when the cancer is still confined to the prostate. For men with low-grade tumors (a Gleason score of 3 or less), the 15-year cancer-specific survival rate is 93%. That number drops to 82% for intermediate-grade cancers and 71% for higher-grade tumors. The pattern is clear: the less aggressive the cancer and the earlier it’s caught, the more likely surgery is to be the only treatment you’ll ever need.
During surgery, the removed prostate is examined under a microscope to check whether cancer cells extend to the cut edges of the tissue. These are called surgical margins. When margins are “negative,” meaning no cancer cells are found at the edges, the odds of long-term cure are significantly better. Men with “positive” margins, where cancer cells reach the edge of the removed tissue, face a two- to five-fold higher risk of the cancer coming back, though positive margins alone don’t necessarily mean the cancer will become life-threatening.
Why Cancer Can Come Back After Surgery
The prostate sits in a tight space surrounded by nerves, the bladder, and the rectum. Cancer cells can sometimes extend just beyond the outer capsule of the prostate before surgery, making them invisible on imaging and impossible to remove completely. If even a tiny cluster of cells remains in the tissue bed where the prostate used to be, those cells can eventually multiply and produce detectable levels of PSA, the protein used to track prostate cancer.
A more concerning scenario is micrometastatic disease, where cancer cells have already traveled to distant sites like lymph nodes or bone before surgery. These deposits can be too small to detect with any current scanning technology. In these cases, removing the prostate addresses the primary tumor but not the cancer that has already left. This is the main reason surgery alone cannot cure every case.
To improve staging accuracy, surgeons often remove lymph nodes from the pelvis during the operation. An extended lymph node dissection detects cancer spread in roughly twice as many patients compared to a more limited removal. In one study, the extended approach found cancer in lymph nodes in 26% of high-risk patients, compared to 12% with the limited technique. Knowing whether lymph nodes are involved helps determine whether additional treatment is needed.
How Doctors Know If Surgery Worked
After the prostate is removed, your PSA level should drop to essentially zero, since the prostate is the main source of PSA in the body. The benchmark for success is a PSA reading of 0.03 ng/mL or less. Your doctor will check your PSA regularly, typically every few months for the first few years and then less frequently.
If PSA rises to 0.2 ng/mL or higher on two separate blood draws, that’s considered biochemical recurrence, the earliest sign that some cancer cells are still active somewhere in the body. The 15-year risk of this happening varies considerably by risk group: about 16% for men who had low-risk cancer, 30% for intermediate-risk, and 46% for high-risk. Importantly, a rising PSA doesn’t always mean the cancer will become dangerous. Many men with biochemical recurrence live for decades without ever developing symptoms or needing further treatment.
There’s also a gray zone. Some men have PSA levels that are detectable but low and stable, sitting between 0.03 and 0.2 ng/mL. If the level stays flat and isn’t rising, it may simply reflect a tiny amount of benign prostate tissue left behind during surgery. If it starts climbing, that’s a different story and warrants closer monitoring.
What Happens If Cancer Returns
A rising PSA after surgery doesn’t mean you’re out of options. Radiation therapy directed at the area where the prostate used to sit is the most common next step. This is called salvage radiation, and it’s most effective when started early, while PSA levels are still low. The decision to proceed with radiation depends on several factors, including how quickly PSA is rising, what the surgical margins looked like, and the original grade of the cancer.
In some cases, doctors may recommend radiation shortly after surgery even before PSA rises, particularly if the pathology report shows worrisome features like positive margins or cancer that had grown into the seminal vesicles. This preventive approach is called adjuvant radiation. Both strategies aim to eliminate any remaining cancer cells in the pelvis before they have a chance to spread further.
Surgery vs. Monitoring for Low-Risk Cancer
For men with low-risk, slow-growing prostate cancer, the survival benefit of immediate surgery is less clear-cut. A major trial published in the New England Journal of Medicine followed men for a median of 10 years and found that prostate cancer-specific survival was at least 98.8% regardless of whether men had surgery, radiation, or active monitoring with regular PSA checks and biopsies. The difference in cancer deaths among the three groups was not statistically significant.
Where surgery did show an advantage was in reducing disease progression and the development of metastases. Men in the monitoring group were about 2.5 times more likely to develop metastases and roughly 2.5 times more likely to see their cancer progress compared to those who had surgery. So while surgery may not save more lives in the short term for low-risk cancers, it does reduce the chance that the cancer will advance and eventually require treatment.
This tradeoff matters because surgery comes with real side effects.
Side Effects and Recovery
The two most significant side effects of prostate removal are urinary incontinence and erectile dysfunction. Both occur because the prostate is nestled against the nerves and muscles that control bladder function and erections. Even with nerve-sparing surgical techniques, some degree of disruption is common.
Recovery takes longer than most men expect. Improvements in both urinary control and sexual function continue well beyond the two-year mark. In a prospective study tracking men from 2 to 4 years after surgery, about 23% showed continued improvement in continence and 42% showed improvement in erectile function during that window. Men who had some erectile function at the two-year point were significantly more likely to keep improving. The key takeaway: recovery is a years-long process, not a months-long one.
For men with low-risk cancer who may live decades with their diagnosis, these side effects weigh heavily in the decision. Active surveillance avoids these consequences entirely, at least until or unless the cancer shows signs of becoming more aggressive and treatment becomes necessary.
The Bottom Line on Cure Rates
Surgery cures most men with localized prostate cancer. The likelihood depends on the cancer’s aggressiveness and stage at the time of surgery. Men with low-grade, organ-confined disease have a greater than 90% chance of being cancer-free at 15 years. Men with higher-grade or more advanced tumors face meaningfully higher recurrence rates, but even when cancer does return, follow-up treatments like radiation can often control it. The combination of surgery followed by radiation when needed gives most men with localized prostate cancer an excellent long-term outlook.