Types of Breast Cancer

Breast cancer type is categorized by whether it begins in the ducts or lobules, the organs responsible for breast milk production. Understanding the specific type of breast cancer can help you ask better questions and work with your physicians to get the best breast cancer treatments.

Ductal Carcinoma In-Situ (DCIS)

DCIS is a type of early breast cancer confined to the inside of the ductal system.
Infiltrating Ductal Carcinoma (IDC)

IDC is the most common type of breast cancer representing 78% of all malignancies. These lesions appear as stellate (star like) or well-circumscribed (rounded) areas on mammograms. The stellate lesions generally have a poorer prognosis.

Medullary Carcinoma

Medullary carcinoma accounts for 15% of all breast cancer types. It most frequently occurs in women in their late 40s and 50s, presenting with cells that resemble the medulla (gray matter) of the brain.
Infiltrating Lobular Carcinoma (ILC)

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