Skip to content
My WebMD Sign In, Sign Up

Breast Cancer Health Center

Font Size

Breast Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] - Cellular Classification of Breast Cancer

The following is a list of breast cancer histologic classifications.[1] Infiltrating or invasive ductal cancer is the most common breast cancer histologic type and comprises 70% to 80% of all cases.

  • Carcinoma, NOS (not otherwise specified).
  • Ductal.
    • Intraductal (in situ).
    • Invasive with predominant intraductal component.
    • Invasive, NOS.
    • Comedo.
    • Inflammatory.
    • Medullary with lymphocytic infiltrate.
    • Mucinous (colloid).
    • Papillary.
    • Scirrhous.
    • Tubular.
    • Other.
  • Lobular.
    • In situ.
    • Invasive with predominant in situ component.
    • Invasive.[2]
  • Nipple.
  • Other.
    • Undifferentiated carcinoma.

The following are tumor subtypes that occur in the breast but are not considered to be typical breast cancers:

Recommended Related to Breast Cancer

General Information About Breast Cancer Treatment and Pregnancy

Breast cancer is the most common cancer in pregnant and postpartum women, occurring in about 1 in 3,000 pregnant women. The average patient is between 32 to 38 years of age and, with many women choosing to delay childbearing, it is likely that the incidence of breast cancer during pregnancy will increase. Breast cancer pathology is similar in age-matched pregnant and nonpregnant women. Hormone receptor assays are usually negative in pregnant breast cancer patients, but this may be the result...

Read the General Information About Breast Cancer Treatment and Pregnancy article > >

  • Phyllodes tumor.[3,4]
  • Angiosarcoma.
  • Primary lymphoma.

References:

  1. Breast. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 347-76.
  2. Yeatman TJ, Cantor AB, Smith TJ, et al.: Tumor biology of infiltrating lobular carcinoma. Implications for management. Ann Surg 222 (4): 549-59; discussion 559-61, 1995.
  3. Chaney AW, Pollack A, McNeese MD, et al.: Primary treatment of cystosarcoma phyllodes of the breast. Cancer 89 (7): 1502-11, 2000.
  4. Carter BA, Page DL: Phyllodes tumor of the breast: local recurrence versus metastatic capacity. Hum Pathol 35 (9): 1051-2, 2004.
1

WebMD Public Information from the National Cancer Institute

Last Updated: February 25, 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.
Next Article:

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