Clinical Taxonomy v2.0

Types of Breast Cancer

According to the specific cell that has become cancerous in the breast, breast cancer is categorized into different types and subtypes.

Biological Foundation

Understanding Breast Cancer Types

Breast cancer is not a single disease. It includes multiple types and subtypes that originate from different breast tissues and biological pathways.

The classification shown below groups breast cancers into invasive, non-invasive, special forms, and molecular subtypes that help guide diagnosis and treatment decisions.

Types of Breast Cancer classification diagram
FIG. 01 Taxonomy MatrixVerified Clinical Hierarchy
Pathological Reference Data • 2026
Clinical Taxonomy

Main Types of Breast Cancer

Below are the two main types of breast cancer.

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Invasive Breast Cancer

A type of cancer in which the cancer cells has spread from the breast ducts or glands to other parts of the breast.

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Non-Invasive Breast Cancer

A type of cancer in which the cancer cells remains in a particular location of the breast, without spreading to surrounding tissue, lobules or ducts.

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Clinical Taxonomy

Other Types of Breast Cancer

Several less common forms of breast cancer are also recognized.

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Inflammatory Breast Cancer

Inflammatory Breast cancer (IBC) is a rare and aggressive form of breast cancer. It accounts for about 1-5% of breast cancer.

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Paget Disease of the Breast

Paget disease of breast is a rare type of breast cancer that primarily affects the skin of the nipple and the areola.

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Rare Breast Cancer Types

These types occur less frequently than common forms, often requiring specialized diagnostic and treatment approaches due to their distinct characteristics.

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Key Classification

Breast Cancer Sub-Types

Breast cancer is not a single disease but rather a collection of different types, and understanding the sub-types of breast cancer is crucial for diagnosis and treatment.