Definition of Gleason score - NCI Dictionary of Cancer Terms

Page Options

	Quick Links


	Director's Corner Updates from the Director Dictionary of Cancer Terms Cancer-related terms NCI Drug Dictionary Definitions, names, and links Funding Opportunities Research and training NCI Publications Order/download free booklets Advisory Boards and Groups Information, meetings, reports Science Serving People Learn more about NCI Español Información en español

Questions about cancer?


	1-800-4-CANCER

	LiveHelp® online chat

Quit Smoking Today

	NCI Highlights


	Report to Nation Finds Declines in Cancer Incidence, Death Rates High Dose Chemotherapy Prolongs Survival for Leukemia Prostate Cancer Study Shows No Benefit for Selenium, Vitamin E The Nation's Investment in Cancer Research FY 2009 Past Highlights

Search for

Starts with

Contains

In English En español

Gleason score (GLEE-sun...)

A system of grading prostate cancer tissue based on how it looks under a microscope. Gleason scores range from 2 to 10 and indicate how likely it is that a tumor will spread. A low Gleason score means the cancer tissue is similar to normal prostate tissue and the tumor is less likely to spread; a high Gleason score means the cancer tissue is very different from normal and the tumor is more likely to spread.

Previous Definitions:	GIST, gland, gland of Lieberkuhn, glans penis, glaucoma
Next Definitions:	Gleevec, Gliadel Wafer, glial cell, glial tumor, glioblastoma