Gleason Grading System

The Gleason Grading System is a system for CANCER STAGING.

The Gleason Grading System is used to help evaluate the prognosis of men with prostate cancer.

A pathologist assigns a GLEASON GRADE to the most common Tumour pattern in a Biopsy specimen (Primary Grade) then the second most common (Secondary Grade). The grades are added together to give the Gleason Score.

Sometimes pathologists will also give a grade to a third component of the specimen (Tertiary Grade) although this is recorded separately and is not added to the score.

For further information on the Gleason Grading System, see the National Cancer Institute website.