NCCN Guidelines for Patients
Prostate Cancer, Version 1.2016
The grading system for prostate cancer is called the
Gleason score. The Gleason score is used by doctors
to plan treatment. Results from the prostate MRI,
biopsy, or both are used for scoring.
First, the cancer is assigned two Gleason grades. The
primary grade is the most common Gleason pattern.
The secondary grade is the second most common
Gleason grades are depicted in
comprised of cells with a grade of 1 or 2 can’t be
scored on a prostate biopsy. Therefore, Gleason
grades range from 3 for glands made of cancer cells
that look almost normal to 5 for very abnormal cells
that aren’t able to form glands.
The primary and secondary grades are added
together to get the Gleason score. Gleason scores
range from 2 to 10, but most prostate cancers are
scored 6 to 10.
briefly describes what the
scores mean. Higher Gleason scores mean the
cancer is more likely to grow and spread.