What Is the Gleason Score? A Plain-Language Guide for International Prostate Cancer Patients — What the Number Means, Why It Matters, and What Comes Next
Your biopsy came back positive. The report says Gleason 7, or 3+4=7, or Grade Group 2 — and the doctor moved on before you could ask what any of it meant. This guide explains the Gleason score properly: what it is built from, what each number means for prognosis, how Grade Groups differ from the old scoring system, and what your specific score means for your treatment options in India.
By Gaf Healthcare Editorial Team
2026-05-25
What Is the Gleason Score? A Plain-Language Guide for International Prostate Cancer Patients — What the Number Means, Why It Matters, and What Comes Next
Your biopsy came back positive. The doctor handed you a report with a number — Gleason 7, or 3+4=7, or Grade Group 2 — and moved on to the next sentence before you had time to ask what any of it meant.
This happens to almost every man who receives a prostate cancer diagnosis. The Gleason score is arguably the most important single number in your pathology report.
It is also the one most patients leave the clinic not fully understanding.
This guide explains it properly — not the watered-down version designed to stop you from worrying.
The actual version: what the number is built from, what it predicts, how it guides treatment decisions, and what your specific score means for your options right now.
| Gleason score range | 6 to 10 (in practice) |
| Gleason 6 (3+3) | Low risk — many never need treatment |
| Gleason 7 (3+4) | Intermediate — favourable |
| Gleason 7 (4+3) | Intermediate — unfavourable |
| Gleason 8 (4+4) | High risk — needs active treatment |
| Gleason 9–10 | Very high risk — aggressive treatment |
What Is the Gleason Score and Where Does It Come From?
The Gleason score comes from your biopsy — the needle samples taken from your prostate. A pathologist examines those tissue samples under a microscope and looks at how the cancer cells are arranged.
Normal prostate cells form neat, well-organised glandular structures. Cancer cells lose that organisation.
The further they have drifted from normal architecture — the more chaotic they look — the higher the grade, and the more aggressive the cancer is likely to be.
The system was developed by an American pathologist named Donald Gleason in the 1960s and has been refined multiple times since.
It remains the most universally used grading system for prostate cancer in the world.
The pathologist assigns a grade from 1 to 5 to the cancer. Grade 1 cells look almost like normal prostate tissue. Grade 5 cells look nothing like it — highly disordered, irregular, and infiltrative.
In modern practice, grades 1 and 2 are almost never reported, so the effective range is grade 3 to 5.
Why there are two numbers — primary and secondary grade
Prostate cancer is rarely uniform. Different areas of the same tumour can have different grades. The pathologist identifies the two most common patterns in the biopsy and reports them separately — the primary grade and the secondary grade.
The primary grade is the pattern that takes up more than 50 percent of the tumour tissue. The secondary grade is the next most common pattern.
These two numbers are added together to produce the Gleason score.
A report that says 3+4=7 means the dominant pattern is grade 3 — and the secondary pattern is grade 4.
A report that says 4+3=7 means the dominant pattern is grade 4 — and the secondary pattern is grade 3. Both add up to 7. But they are not the same cancer.
When patients see two Gleason 7 scores — one labelled 3+4 and one labelled 4+3 — they often assume the two are equivalent because the total is the same. They are not.
In a 3+4 tumour, the dominant pattern is the lower-grade, less aggressive grade 3. In a 4+3 tumour, the dominant pattern is the higher-grade, more aggressive grade 4. A 4+3=7 tumour carries a meaningfully higher risk of cancer progression than a 3+4=7 tumour — even though both are often called "Gleason 7."
Grade Groups — the Cleaner System That Replaced the Confusing One
The Gleason system had a problem. The scores ran from 6 to 10, but patients — and some doctors — would hear "6 out of 10" and assume the cancer was moderate. It is not. A Gleason score of 6 is the lowest grade of cancer that is reported. It is not halfway up a ten-point scale.
To fix this confusion, the International Society of Urological Pathology introduced Grade Groups in 2016. The Grade Group system runs from 1 to 5 and maps directly to prognosis.
Grade Group 1 is the least aggressive. Grade Group 5 is the most aggressive.
Modern pathology reports in India — and at all major international cancer centres — report both the Gleason score and the Grade Group.
If your report only shows one of these, ask for the other.
| Grade Group | Gleason score | What the cells look like | Risk |
|---|---|---|---|
| Grade Group 1 | Gleason 6 (3+3) | Close to normal. Glands still well-formed. Grows very slowly. | Low |
| Grade Group 2 | Gleason 7 (3+4) | Mostly well-formed glands with some poorly formed areas. Moderate. | Intermediate — favourable |
| Grade Group 3 | Gleason 7 (4+3) | Mostly poorly formed glands. The dominant pattern is more aggressive. | Intermediate — unfavourable |
| Grade Group 4 | Gleason 8 (4+4, 3+5, 5+3) | High-grade. Very few normal-looking glands. Needs active treatment. | High |
| Grade Group 5 | Gleason 9–10 (4+5, 5+4, 5+5) | Most aggressive. Cells look nothing like normal prostate tissue. | Very high |
Not sure what your Gleason score means for your treatment options? Get it explained in writing.
Send your biopsy pathology report to GAF Healthcare on WhatsApp. A uro-oncologist explains what your Gleason score and Grade Group mean for your specific situation — which treatment options apply, what comes next, and what it will cost in India. Free. Within 48 hours.
Get My Gleason Score Explained →What Each Score Actually Means for Your Situation
Gleason 6 (Grade Group 1) — the most important score to understand correctly
This is the score that causes the most unnecessary anxiety — and the most unnecessary treatment. Gleason 6 prostate cancer is real cancer. The cells are abnormal.
But it grows so slowly that most men with this diagnosis will die of something entirely unrelated to their prostate before this cancer ever causes a problem.
The ten-year prostate cancer-specific mortality for Gleason Grade Group 1 disease is below three percent.
Studies that tracked men with Gleason 6 cancer for twenty years found that the vast majority never developed metastatic disease — even those who chose not to treat immediately.
This is the scientific basis for active surveillance — a clinically endorsed approach of monitoring rather than treating. It is not the same as doing nothing.
It involves regular PSA tests, periodic MRI scans, and occasional repeat biopsies to confirm the cancer has not upgraded.
If you have been told you have Gleason 6 cancer and have been immediately recommended surgery or radiation without any discussion of active surveillance, you should seek a second opinion before agreeing to treatment.
No reputable oncology guideline recommends automatic treatment for Grade Group 1 disease in a healthy man.
Gleason 7 (3+4) — Grade Group 2 — favourable intermediate risk
Gleason 3+4=7 is the most common score at which men choose active treatment — and in most cases, that is the right decision. The dominant pattern is grade 3, but the presence of grade 4 tissue means there is meaningful cancer that benefits from treatment.
Surgery and radiation both achieve excellent outcomes for Gleason 7 (3+4) disease — ten-year cancer-specific survival above 95 percent.
The choice between them is driven by side effect preferences, patient age and fitness, and logistical factors rather than a clear survival advantage of one over the other.
Some patients with very favourable Gleason 3+4 disease — only a small volume of grade 4 tissue, limited positive cores, low PSA — are candidates for active surveillance under close monitoring.
This decision requires careful specialist review rather than a blanket recommendation either way.
Gleason 7 (4+3) — Grade Group 3 — unfavourable intermediate risk
Gleason 4+3=7 is where the word "unfavourable" becomes clinically meaningful. The dominant pattern is grade 4. Active surveillance is not appropriate — these men need treatment. The question is which treatment.
For localised 4+3 disease, robotic prostatectomy or radiation with short-course hormone therapy are both appropriate.
High-quality centres in India — Fortis FMRI, Medanta, Apollo Delhi — handle Grade Group 3 cases routinely with outcomes matching published international benchmarks.
Gleason 8 (Grade Group 4) — high risk
Gleason 8 disease is high risk. The cancer cells look significantly abnormal. These tumours have a higher propensity to spread beyond the prostate — and staging investigations including a PSMA PET-CT scan are essential before treatment is planned.
Treatment for Gleason 8 localised disease typically involves either radical prostatectomy with extended lymph node dissection, or external beam radiation.
Radiation for Gleason 8 is combined with long-course hormone therapy lasting 18 to 24 months.
Both approaches can achieve disease control for appropriately staged Gleason 8 disease. But the treatment plan needs to be built — not just chosen — by a multidisciplinary team.
Medanta's weekly prostate cancer tumour board and Apollo Delhi's oncology MDT are the settings where this kind of decision-making happens correctly.
Gleason 9–10 (Grade Group 5) — very high risk
Gleason 9 and 10 disease is the most aggressive grade of prostate cancer. These tumours grow faster and spread earlier. A PSMA PET-CT scan is non-negotiable before treatment planning — not an optional addition.
If the cancer is still localised — all within the prostate with no evidence of nodal or distant spread — treatment with curative intent is still possible.
It typically involves surgery or radiation combined with long-course ADT and possibly docetaxel chemotherapy.
For Gleason 9 to 10 disease, the hospital and specialist choice matters enormously.
These cases need a surgeon or radiation oncologist who sees multiple Gleason Grade Group 5 cases per year — not one who encounters them occasionally.
Have a Gleason 8, 9, or 10 diagnosis? Get a specialist review before you commit to any treatment plan.
High-grade prostate cancer requires a multidisciplinary team review before a treatment plan is finalised. Send your pathology, MRI, and PSA to GAF Healthcare. We arrange an urgent specialist consultation — free — within 48 hours. Do not start treatment before your staging is complete.
Gleason Score Is One Number — Not the Only Number
The Gleason score is the most important piece of information from your biopsy. But it does not function in isolation. A complete risk assessment uses three numbers together — and your treatment recommendation changes depending on the combination.
The three numbers are: your PSA level at diagnosis, your Gleason Grade Group, and your clinical T stage — the physical extent of the tumour assessed by MRI and digital rectal examination.
How the numbers interact — some examples
A man with Gleason 7 (3+4), PSA of 8, and T2a staging is low-to-intermediate risk. His treatment options include active surveillance, surgery, or radiation.
There is no emergency. The decision can be made carefully and deliberately over several weeks.
A man with Gleason 7 (4+3), PSA of 18, and T3a staging — the tumour has breached the prostate capsule — is high risk. His treatment needs to start promptly.
The discussion is now about which combination of approaches, in which order, at which hospital.
A man with Gleason 9, PSA of 55, and T3b staging — the tumour has grown into the seminal vesicles — is very high risk.
He needs urgent staging with a PSMA PET-CT to establish whether the cancer has spread to lymph nodes or bone before any local treatment is planned.
Your biopsy report — including the individual core results, not just the summary. The number of positive cores and the percentage of each core involved matters. Your most recent PSA result with the date it was taken. All previous PSA readings if you have them — the trend is as important as the number. Your MRI report and, critically, the imaging disc itself — the films, not just the written report.
If you have had a PSMA PET-CT — bring the report and the disc. If you have not, and your Gleason score is Grade Group 3 or above, your first visit to India may well begin with this scan.
How Your Gleason Score Determines What Treatment India Recommends
India's top hospitals follow the same international guidelines for prostate cancer treatment as UK and US centres — the EAU and AUA guidelines, both updated annually.
What differs is the cost of the treatment, the speed of access, and the availability of advanced investigations like PSMA PET-CT. Here is how Gleason score maps to treatment at India's major cancer centres:
| Grade Group | Gleason | Typical treatment approach in India | Approx. cost India |
|---|---|---|---|
| GG 1 | Gleason 6 (3+3) | Active surveillance (monitoring) — or SBRT/surgery if preferred | $0 (surveillance) or $5–9K |
| GG 2 | Gleason 7 (3+4) | Robotic RP or SBRT/EBRT — no ADT typically needed | $6,500–9,000 |
| GG 3 | Gleason 7 (4+3) | Robotic RP or EBRT + 4–6 months ADT | $7,000–11,000 |
| GG 4 | Gleason 8 | PSMA PET-CT first · RP + ELND or EBRT + 18–24m ADT | $9,000–14,000 |
| GG 5 | Gleason 9–10 | PSMA PET-CT urgent · multimodal — MDT review essential | $11,000–20,000+ |
Want a personalised treatment recommendation based on your Gleason score and PSA?
Send your biopsy report, PSA history, and MRI to GAF Healthcare on WhatsApp. A uro-oncologist maps your specific Gleason score, PSA, and T stage to the right treatment — and tells you which hospital in India, which specialist, and what it will cost. Free. Within 48 hours.
Get My Treatment Recommendation →What a Gleason Score Looks Like in a Real Situation
Andrew Mganga was 67 when his PSA came back elevated during a routine check in Tanzania. His local hospital performed a biopsy. The report said Gleason 4+3=7, Grade Group 3. His PSA was 14.8.
His local doctor told him the cancer was "not too bad." Andrew did not feel reassured.
A Gleason 4+3 tumour with a PSA of nearly 15 is intermediate-to-high risk — it needed treatment, not monitoring. He found GAF Healthcare online and sent his reports.
The GAF Healthcare specialist reviewed his pathology and MRI, confirmed the tumour was organ-confined, and recommended robotic radical prostatectomy at Fortis FMRI in Gurgaon.
Andrew had the surgery, was discharged five days later, and returned to Tanzania with an undetectable PSA six weeks post-operatively.
"The pain was much less than I expected. They told me the robot means smaller cuts. I believed them when I saw how I felt. Five days and I am going home. Tell people. It is possible."
— Mr. Andrew John Mganga, 67, Tanzania · Gleason 4+3=7, robotic prostatectomy at Fortis FMRI · Read Andrew's full story →
Frequently Asked Questions About the Gleason Score
Is Gleason 6 prostate cancer serious?
Gleason 6 — Grade Group 1 — is the lowest grade of prostate cancer that is reported. It is real cancer, but it grows so slowly that most men will never develop symptoms or die from it.
The ten-year prostate cancer-specific mortality for Gleason 6 disease is below three percent.
Most international guidelines now recommend active surveillance as the first approach for Grade Group 1 disease in healthy men.
If you have been told you need urgent surgery for a Gleason 6 diagnosis, a second specialist opinion is strongly advisable before you agree.
What is the difference between Gleason 3+4 and 4+3?
Both add up to Gleason 7, but the order reveals which pattern dominates the tumour.
In 3+4, the lower-grade, less aggressive pattern is dominant. In 4+3, the higher-grade, more aggressive pattern is dominant.
Clinically, Gleason 3+4 is Grade Group 2 — intermediate risk, favourable. Gleason 4+3 is Grade Group 3 — intermediate risk, unfavourable.
Grade Group 3 men are not candidates for active surveillance and require active treatment. Confirm with your specialist which category applies to you.
Can the Gleason score change after surgery?
Yes — and this is more common than patients expect. The Gleason score from a biopsy is based on needle samples — a small representative portion of the tumour.
The Gleason score from the surgical specimen is based on the entire removed prostate, which gives a more complete picture.
Approximately 30 to 40 percent of men find their post-surgical Gleason score is higher than the biopsy score — a phenomenon called upgrading. This does not mean the surgery was wrong.
It means the biopsy sampled only part of the story. A Gleason upgrade after surgery may change post-operative monitoring intensity or lead to a recommendation for adjuvant radiation.
What is the Gleason score if prostate cancer has spread?
The Gleason score describes the pathological grade of the cancer cells, not how far the cancer has spread.
A man can have Gleason 6 cancer that has not spread, and a man can have Gleason 9 cancer that has already spread to his lymph nodes and bones.
The spread is described by the TNM staging system — T for the primary tumour, N for lymph nodes, and M for distant metastasis.
The Gleason score and the TNM stage together determine the full picture. A Gleason score without staging is an incomplete assessment.
Will Indian hospitals accept my biopsy report from my home country?
In most cases, yes. Major Indian cancer centres — Fortis FMRI, Medanta, Apollo Delhi, Kokilaben Mumbai — will review your biopsy report from your home country as part of the pre-treatment assessment.
In some cases — particularly for Grade Group 4 and 5 cancers — the specialist may request a second pathological opinion on the original biopsy slides. Slides, not just the written report, are needed for this.
If your diagnosis was made in a country with limited uro-pathology expertise, a second opinion in India adds a valuable layer of quality assurance before treatment begins.
Is a Gleason score of 7 curable?
Yes — for most men with Gleason 7 (3+4 or 4+3) disease confined to the prostate, cure is achievable with radical prostatectomy or radiation therapy.
The ten-year cancer-specific survival for Grade Group 2 and 3 localised disease is above 90 to 95 percent at high-volume centres.
In India, robotic prostatectomy for Gleason 7 localised disease costs USD 6,500 to 9,000 — compared to USD 25,000 to 55,000 in the United States.
SBRT costs USD 5,000 to 9,000 — compared to USD 25,000 to 50,000 in the United States. The cancer control outcomes are equivalent. The cost is not.
Ready to find out what your Gleason score means for treatment in India? Get a free written opinion.
Send your biopsy pathology report, PSA history, and MRI to GAF Healthcare on WhatsApp. A uro-oncologist gives you a written explanation of your Gleason score and Grade Group, tells you which treatment options apply, and tells you exactly what it will cost in India. Free. No obligation.
The full diagnosis and staging guide — PSA, biopsy types, mpMRI, PSMA PET-CT, TNM staging, and risk groups explained in one complete resource.
All treatment options — surgery, radiation, hormone therapy, and chemotherapy — with costs, outcomes, and trip planning.
What surgery involves for each Gleason grade group, recovery timelines, costs, and how to choose the right surgeon.
Which hospital in India is right for your Gleason grade — nine hospitals profiled on surgical volume, accreditation, and MDT capability.
A real GAF Healthcare patient from Tanzania who had Gleason 4+3 prostate cancer, came to Fortis FMRI Gurgaon, and returned home cancer-free in five days.
Have a question about your Gleason score that this guide did not answer?
GAF Healthcare's clinical advisors answer specific Gleason score questions — what upgrading means, whether your score makes you a surgery or radiation candidate, whether your home-country biopsy report needs reviewing in India — by WhatsApp within 24 hours.
Ask a Gleason Score Question on WhatsApp →