Skip to content
My WebMD Sign In, Sign Up

Medical Dictionary

Prostate-specific antigen

Pronunciation (pros-teyt-spi-sif-ik an-ti-jen)
  1. Also known as PSA, it is a chemical substance made in the prostate. An elevated PSA level may indicate prostate enlargement or cancer.

Back to Dictionary

WebMD Definition

© 2006 WebMD, Inc. All rights reserved.

Hot Topics

Health Solutions From Our Sponsors

WebMD Video: Now Playing

click to hide section Dirty Truth About Hand Washing

Click here to wach video: Dirty Truth About Hand Washing

Which sex is the worst about washing up? Why is it so important? We’ve got the dirty truth on how and when to wash your hands.

Click here to watch video: Dirty Truth About Hand Washing

click to expand section Outdoor Exercise and Allergies
click to expand section College Workout
click to expand section Healthy School Lunches
click to expand section Truth About Shampoo and Conditioner

Popular Slideshows & Tools on WebMD

Previous Next
Close up of eye
Concentration Killers
What's robbing your focus?
Woman sitting in front of UV lights
Psoriasis Flare?
What you need to know.
Ra Management Get A Personalized Report
Rheumatoid Arthritis
Assess your symptoms.
finger blood test
Vitamin D
Ask questions and get answers.
Psoriasis
Adult Skin Problems
Bumps, rashes, and hives.
nurse helping woman on crutches
Knee Surgery
How much time to recover?
woman stretching
Living Healthy Guide
Must-see diet and fitness info.
fruit drinks
Brain Foods
Foods that can help you focus.
child brushing his teeth
Dirtiest Places
Your kids will find them.
man with cold on couch
Cold & Flu Season
How to feel better fast.
mother with children in park
Baby to Teen
Parenting tips for every age.
MS Overview
Multiple Sclerosis
Recognizing symptoms.
» See all slideshows

Women's Health Newsletter

Find out what women really need.