Breast Tumors - National Breast Cancer Foundation - tumors breast cancer

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Breast cancer: Symptoms, causes, and treatment tumors breast cancer


There are two types of breast cancer tumors: those that are non-cancerous, or ‘benign’, and those that are cancerous, which are ‘malignant’. Malignant tumors are cancerous and aggressive because they invade and damage surrounding tissue. Metastatic cancer is when cancer cells of a.

Breast cancer tumors can differ in many ways. Learn about the types of tumors that can develop and how differences in tumor types affect prognosis.

Breast cancer most often begins with cells in the milk-producing ducts (invasive ductal carcinoma). Breast cancer may also begin in the glandular tissue called.

Invasive ductal carcinoma (IDC) is the most common type of breast cancer. About 80% of all breast cancers are invasive ductal carcinomas.