Health Concern On Your Mind?
See what your medical symptoms could mean, and learn about possible conditions.
Drugs & Supplements
Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.
Having trouble identifying your pills?
Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.
Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.
Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.
Read expert perspectives on popular health topics.
Connect with people like you, and get expert guidance on living a healthy life.
Sign up to receive WebMD's award-winning content delivered to your inbox.
Breast cancer is the abnormal growth of the cells that line the ducts and lobes of the breast. The main types of breast cancer are:
There are also some less common types of breast cancer, such as inflammatory breast cancer.
When abnormal cells in the lining of a duct or lobe of the breast haven't spread, they are said to be "in situ" (say "in-SY-too").
WebMD Medical Reference from Healthwise
©2005-2016 WebMD, LLC. All rights reserved.
WebMD does not provide medical advice, diagnosis or treatment. See additional information.