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

Below are the two main types of 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.
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.
Several less common forms of breast cancer are also recognized.
Inflammatory Breast cancer (IBC) is a rare and aggressive form of breast cancer. It accounts for about 1-5% of breast cancer.
Paget disease of breast is a rare type of breast cancer that primarily affects the skin of the nipple and the areola.
These types occur less frequently than common forms, often requiring specialized diagnostic and treatment approaches due to their distinct characteristics.
“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.”