Skip to content

Breast Cancer Health Center

Font Size

Breast Cancer Types - Topic Overview

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:

  • Ductal carcinoma, which is cancer that begins in the ducts camera.gif of the breast. This is the most common type of breast cancer.
  • Lobular carcinoma, which is cancer that begins in the lobes camera.gif of the breast. This is the second most common type.
  • Some breast cancer is a mixture of both ductal and lobular carcinoma.

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").

    This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http:// cancer .gov or call 1-800-4-CANCER.

    WebMD Medical Reference from Healthwise

    Last Updated: November 14, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
    1
    Next Article:

    Breast Cancer Types Topics

    Today on WebMD

    Breast Cancer Overview
    From self-exams and biopsies to reconstruction, we’ve got you covered.
    Dealing with breast cancer
    Get answers to your questions.
     
    woman having mammogram
    Experts don’t agree on all fronts, but you can be your own advocate.
    woman undergoing breast cancer test
    Many women worry. But the truth? Most abnormalities aren’t breast cancer.
     
    Breast Cancer Treatments Improving
    VIDEO
    Resolved To Quit Smoking
    SLIDESHOW
     
    Woman getting mammogram
    Article
    Screening Tests for Women
    SLIDESHOW
     
    ovarian cancer overview slideshow
    SLIDESHOW
    serious woman
    Article
     
    what is your cancer risk
    HEALTH CHECK
    10 Ways to Revitalize Slideshow
    SLIDESHOW