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Learn about this extremely rare breast cancer which can be a complication of breast radiation therapy and can develop about 5 to 10 years after treatment.
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Learn about ductal carcinoma in situ or DCIS, a kind of breast cancer that has not spread into nearby breast tissue.
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Paget disease of the nipple starts in the breast ducts and spreads to the skin of the nipple and then to the areola. Learn how it’s diagnosed and treated.
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Learn more about what breast cancer is including the basics of where the cancer starts and how it spreads from the American Cancer Society's cancer experts.
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Breast cancers that have spread into surrounding breast tissue are known as invasive breast cancer. Learn about different kinds of invasive breast cancer.
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Learn more about triple-negative breast cancer including the signs and symptoms, diagnosis, and treatment options.
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Learn about the different types of breast cancer including the common types of DCIS, invasive ductal carcinoma, and invasive lobular carcinoma.
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Learn more about inflammatory breast cancer including the signs and symptoms, diagnosis, and treatment options.
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A sarcoma is a type of cancer that develops from certain tissues, like bone or muscle.
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Get the information you need to understand your breast cancer diagnosis with details on the various types of breast cancer, grading, hormone status, staging, and prognosis.