breast

Fibroadenoma

What is a fibroadenoma? A fibroadenoma is a non-cancerous type of breast tumour the most common breast tumour in women under 40 years old. The tumour is made up of epithelial cells and fibroblasts normally found in the breast. Fibroadenomas are usually round tumours that feel firm to the touch. Their size may change depending …
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Invasive lobular carcinoma of the breast

What is invasive lobular carcinoma? Invasive lobular carcinoma is a type of breast cancer. Invasive lobular carcinoma commonly starts from a non-cancerous growth of abnormal breast cells called lobular carcinoma in situ (LCIS). LCIS can be present for months or years before turning into invasive lobular carcinoma. In addition, patients with a previous diagnosis of …
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Ductal carcinoma in situ (DCIS)

What is ductal carcinoma in situ? Ductal carcinoma in situ (DCIS) is a non-invasive type of breast cancer. The tumour starts from specialized epithelial cells in the glands and ducts of the breast. DCIS is called non-invasive because, after careful microscopic examination, cancer cells were found only on the inside of the ducts and glands. …
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Papillary lesion of the breast

What is a papillary lesion in the breast? Papillary lesion of the breast is a term pathologists use to describe a group of breast tumours that look similar when examined under the microscope. This term includes both non-cancerous tumours and cancers. Papillary lesion is a preliminary diagnosis. Typically, the entire tumour needs to be removed …
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Radial scar

What is a radial scar in the breast? A radial scar is a non-cancerous growth that develops in the breast when there is an increase in the number of glands and ducts surrounding an area of altered connective tissue called a scar. Although non-cancerous, it is associated with a small increased risk of developing breast …
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Complex sclerosing lesion

What is a complex sclerosing lesion in the breast? Complex sclerosing lesion (CSL) is a non-cancerous growth that develops when there is an increase in the number of glands and ducts surrounding an area of altered connective tissue called a scar in the breast. Although non-cancerous, CSL is associated with a small increased risk of …
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Lobular carcinoma in situ (LCIS)

What is lobular carcinoma in situ? Lobular carcinoma in situ (LCIS) is a non-cancerous breast disease. Although LCIS is not a type of cancer, it is associated with an increased risk of developing breast cancer over time. The two types of breast cancer associated with LCIS are invasive ductal carcinoma and invasive lobular carcinoma. The …
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Invasive ductal carcinoma (IDC) of the breast

What is invasive ductal carcinoma of the breast? Invasive ductal carcinoma (IDC) is a type of breast cancer and the most common type of breast cancer worldwide. Another name for this type of cancer is infiltrating ductal carcinoma. How is the diagnosis of invasive ductal carcinoma made? The diagnosis of invasive ductal carcinoma is usually …
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HER2

What is HER2? HER2 is a type of protein called a receptor. It helps the cell respond to signals that tell it to grow and divide to create new cells. The protein sits on the outside of a cell and it can be switched on or off by proteins made by other nearby cells. HER2 …
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