What is The Gleason score and Grade Groups?

The Gleason score is, indeed, the most common system used by doctors to grade prostate cancer. Specifically, the grade of a cancer is related to how much the cancer cells look like normal cells. Consequently, an idea is given to your doctor of how the cancer might behave and what treatment you need.

To find out the Gleason score, or Grade Group, several samples of cells (biopsies) from your prostate are, therefore, looked at by a pathologist.

Furthermore, each sample of prostate cancer cells is graded by the pathologist from 3 to 5 based on how quickly they are likely to grow or how aggressive the cells look.”

Doctors then calculate an overall Gleason score by adding together the 2 most common Gleason grades. For example, if the most common Gleason grade is 3 and the second most common is 4, then they determine that the overall Gleason score is 7. Moreover, they might also write the scores separately as 3 + 4 = 7. Consequently, they now call this combined score the Grade Group.

Furthermore, they categorize the Grade Groups into 5 levels. Specifically, doctors designate Grade Group 1 as the least aggressive and Grade Group 5 as the most aggressive.

Types of Gleason Score

This describes how the Gleason score and Grade Groups align and their significance:

Gleason Score                                                                                              Grade Group

First, Gleason score 6 (or 3 + 3 = 6)                                                                     Grade Group 1

Second, Gleason score 7 (or 3 + 4 = 7)                                                                     Grade Group 2

Third, Gleason score 7 (or 4 + 3 = 7)                                                                    Grade Group 3

In addition, Gleason score 8 (or 4 + 4 = 8)                                                                    Grade Group 4

Finally, Gleason score 9 or 10 (or 4 + 5 = 9, 5 + 4 = 9 or 5 + 5 = 10)                    Grade Group 5

Prostate Cancer Grading & Prognostic Scoring

Doctors use the Gleason Score as the grading system to determine the aggressiveness of prostate cancer. Furthermore, this grading system helps choose appropriate treatment options.

The Gleason Score ranges from 1-5 and describes how much the cancer from a biopsy looks like healthy tissue (lower score). in contrast to abnormal tissue (higher score).

In fact, most cancers receive a grade of 3 or higher. Moreover, since prostate tumors often consist of cancerous cells that have different grades, medical professionals assign two grades for each patient.

Grading

Experts assign a primary grade to describe the cells that make up the largest area of the tumor, and, in addition, a secondary grade to describe the cells of the next largest area.

For instance, if the Gleason Score is written as 3+4=7, it means that, in fact, most of the tumor is grade 3, while the next largest section of the tumor is grade 4; together, they make up the total Gleason Score.

Furthermore, if the cancer almost entirely consists of cells with the same score, doctors, therefore, count the grade for that area twice to calculate the total Gleason Score.

Scores

Typical Gleason Scores range from 6-10.  Furthermore The higher the Gleason Score, the more likely that the cancer will grow and spread quickly.

  • On the other hand, scores of 6 or less indicate that cancer cells look similar to normal cells and suggest that the cancer is likely to grow slowly. In contrast, a score of 7 indicates an intermediate risk for aggressive cancer.
  • Specifically**, when the score is 7, the primary score (largest section of the tumor) is 3 or 4. Thus, a score of 7 indicates that the primary score (largest section of the tumor) is 3 or 4.  Furthermore, doctors find that tumors with a primary score of 3 and a secondary score of 4 have a fairly good outlook, whereas they observe that cancers with a primary Gleason Score of 4 and a secondary score of 3 are more likely to grow and spread. 
  • Consequently, medical professionals classify scores of 8 or higher as describing cancers that are likely to spread more rapidly; therefore, they often refer to these cancers as poorly differentiated or high grade.

TNM Staging

The TNM system stages prostate cancer. TNM stands for Tumor, Node, Metastasis.

Knowing the stage of the cancer helps the doctor determine what treatment you need. They use the information about the stage of the cancer along with:

  • The result of your PSA blood test 
  • What your cells look like under a microscope (the Gleason score)

Tumor (T)

The tumor describes the size of the tumor (area of cancer). This is a simplified description of the T stage.

Four main stages represent cancer size in prostate cancer – T1 to T4.

T1-Stage

T1 means that, as a result, a scan or examination of the prostate cannot detect the cancer because it is too small. Consequently, doctors divide it into T1a, T1b, and T1c.

Specifically, T1a means that the cancer occupies less than 5% of the removed tissue. In this case, surgeons unexpectedly find T1a cancers during surgery for other reasons.

On the other hand, T1b means that the cancer occupies 5% or more of the removed tissue. Similarly, surgeons unexpectedly find T1b cancers during surgery for other reasons.

In contrast, doctors find T1c cancers through biopsy; for example, this occurs after a raised PSA level.

T2-Stage

2 indicates that the cancer completely occupies the prostate gland. **Specifically**, doctors divide it into T2a, T2b, and T2c.

In particular, T2a indicates that the cancer affects only half of one side of the prostate gland.

T2b indicates that the cancer affects more than half of one side of the prostate gland, but not both sides.

Finally, T2c indicates that the cancer affects both sides but remains inside the prostate gland.”

T3-Stage

T3 indicates that, in fact, the cancer breaks through the capsule of the prostate gland. Consequently, doctors divide it into T3a and T3b.

Specifically, T3a indicates that the cancer breaks through the capsule of the prostate gland.

In contrast, T3b indicates that the cancer spreads into the tubes that carry semen (seminal vesicles).

T4-Stage

In addition, T4 indicates that the cancer spreads into nearby body organs, such as the back passage, bladder, or the pelvic wall.

Node (N)

The cancer spread to the lymph nodes is described by Node (N). 

Specifically, experts split N into N0 and N1.

In particular, N0 indicates that the nearby lymph nodes do not contain cancer cells

N1 means there are cancer cells in lymph nodes near the prostate

On the other hand, N1 indicates that cancer cells are present in lymph nodes near the prostate.

Metastasis (M)

Metastasis (M) indicates whether the cancer spreads to a different part of the body. Specifically, doctors classify metastasis into 2 stages – M0 and M1.

In detail, M0 indicates that the cancer hasn’t spread to other parts of your body. On the other hand, M1 indicates that the cancer spreads to other parts of the body outside the pelvis. Furthermore, researchers split it into M1a, M1b, and M1c.

To elaborate, M1a indicates that cancer cells exist in lymph nodes outside the pelvis. In contrast, M1b indicates that cancer cells exist in the bone. Finally, M1c indicates that cancer cells exist in other parts of the body.

Treatment

Your doctor can recommend if you need treatment and the type of treatment you need, based on important factors like the Gleason score and Grade Groups. Furthermore, other factors include:

– The size of the cancer and whether it has spread (the stage)
– First, your PSA level
– In addition, your age and how well you are
– Finally, your own preference about the treatments available and their side effects

In addition, doctors may use these factors to determine your prognosis, which means your likelihood of coming to harm from the cancer if you do or do not have treatment. Consequently, healthcare providers balance this against your overall risk of coming to harm from other illnesses. 

Deciding Factors

Your doctor uses the stage of your cancer to decide which treatment you need. Additionally, treatment also depends on:

  • For instance, what the cancer cells look like under the microscope (Gleason score)
  • Moreover, your PSA blood test level
  • Furthermore, your type of cancer (the type of cells the cancer started in)
  • In addition, your age and general health
  • Finally, how you feel about what the treatments involve and the side effects.

Active Monitoring

You might not receive treatment straight away. In fact, sometimes your doctor monitors your cancer and starts treatment if the cancer begins to grow. Additionally, depending on your situation, they may call this: 

  • Active surveillance
  • And, watchful waiting

Treatment might include the following:

Doctors perform surgery to remove your prostate; moreover, they administer external radiotherapy. In addition, they deliver internal radiotherapy (brachytherapy) and provide hormone therapy.

Furthermore, they conduct chemotherapy and offer symptom control treatment. Additionally, they apply high frequency ultrasound therapy (HIFU) as part of a clinical trial, and finally, they execute cryotherapy as part of another clinical trial.

Biospecimens

Bay Biosciences is, indeed a global leader in providing researchers with high quality, clinical grade, fully characterized human tissue samples, bio-specimens, and human bio-fluid collections.

Specifically, aamples available include cancer (tumor) tissue, cancer serum, cancer plasma, cancer, peripheral blood mononuclear cells (PBMC). and human tissue samples from most other therapeutic areas and diseases.

Moreover, Bay Biosciences maintains and manages its own biorepository, the human tissue bank (biobank) consisting of thousands of diseased samples (specimens) and from normal healthy donors available in all formats and types.

In fact, our biobank procures and stores fully consented, de-identified and institutional review boards (IRB) approved human tissue samples and matched controls.

Additionally, all our human tissue collections, human specimens and human bio-fluids are provided with detailed, samples associated patient’s clinical data.

In particular, critical patient’s clinical data includes information relating to their past and current disease, treatment history, lifestyle choices, biomarkers, and genetic information.

Moreover, patient’s data is extremely valuable for researchers and is used to help identify new effective treatments (drug discovery & development) in oncology, and other therapeutic areas and diseases.

Specifically, Bay Biosciences banks wide variety of human tissue samples and biological samples, including cryogenically preserved at – 80°C.

For example fresh frozen tissue samples, tumor tissue samples, formalin-fixed paraffin-embedded (FFPE), tissue slides, with matching human bio-fluids, whole blood and blood-derived products such as serum, plasma and PBMC.

Furthermore, Bay Biosciences is a global leader in collecting and providing human tissue samples according to the specified requirements and customized, tailor-made collection protocols.

Therefore, please contact us anytime to discuss your special research projects and customized human tissue sample requirements.

Types of Biospecimens

Bay Biosciences provides human tissue samples (human specimens) from diseased and normal healthy donors which includes:

Customized Collections

Moreover, we can also procure most human bio-specimens, furthermore; we offer special collections and requests for human samples that are difficult to find. All our human tissue samples are procured through IRB-approved clinical protocols and procedures.

In addition to the standard processing protocols, Bay Biosciences can also provide human plasma, serum, and PBMC bio-fluid samples using custom processing protocols. Additionally you buy donor-specific collections in higher volumes and specified sample aliquots from us.

Furthermore, Bay Biosciences also provides human samples from normal healthy donors; volunteers, for controls and clinical research, contact us Now.

 

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