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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.
- Paget disease, NOS.
- Paget disease with intraductal carcinoma.
- Paget disease with invasive ductal carcinoma.
Other.
- Undifferentiated carcinoma.

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

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

References:

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.
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.
Chaney AW, Pollack A, McNeese MD, et al.: Primary treatment of cystosarcoma phyllodes of the breast. Cancer 89 (7): 1502-11, 2000.
Carter BA, Page DL: Phyllodes tumor of the breast: local recurrence versus metastatic capacity. Hum Pathol 35 (9): 1051-2, 2004.

WebMD Public Information from the National Cancer Institute

Last Updated: October 07, 2011

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.