Gleason scoring system is used for what purpose and how is the score interpreted?

• A. Bladder cancer histology grading; four patterns
• B. Prostate cancer histology grading; two most common patterns scored 1–5 and summed.
• C. Testicular cancer tumor markers
• D. Kidney stone composition scoring

Answer: (B)

Gleason scoring grades prostate cancer by examining how the cancer tissue looks under the microscope. The pathologist identifies the two most common glandular patterns in the tumor and assigns each a grade from 1 to 5, with higher numbers showing more abnormal, less differentiated tissue. The final score is the sum of those two pattern grades, giving a range typically from 6 to 10.

Interpreting the score: a lower total suggests a less aggressive tumor and often a better prognosis, while a higher total indicates more aggressive cancer and generally a worse prognosis. This score helps guide treatment decisions and how aggressively to manage the disease.

Other options describe grading or assessment for different conditions—bladder cancer histology uses its own grading schemes, testicular cancer relies on tumor markers, and kidney stones are analyzed by stone composition—so they don’t use the Gleason system.