Invasive mucinous carcinoma is a type of breast cancer where the tumour cells are surrounded by a thick fluid called mucin. To be called mucinous carcinoma, at least 90% of the tumour needs to be made up of mucin. Compared to the more common invasive ductal carcinoma, invasive mucinous carcinoma is more likely to develop …
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What is breast cancer? Breast cancer is a general term used to describe a group of malignant (cancerous) tumours that develop from cells normally found in the breast. A malignant tumour is made up of abnormal cells that have the ability to invade surrounding tissues and spread to other parts of the body. The most …
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Phyllodes tumour is a rare type of breast tumour. Most phyllodes tumours will behave like non-cancerous tumours. However, a small number (approximately 10%) will behave like cancer. This behaviour includes the ability to spread through the normal tissue in the breast and to other parts of the body. The entire tumour must be removed surgically …
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Invasive lobular carcinoma is a type of breast cancer that 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. Patients with a previous diagnosis of LCIS are at a higher risk of developing it. What …
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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. If left untreated, patients with DCIS …
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Invasive ductal carcinoma (also known as invasive breast carcinoma) is the most common type of breast cancer. It starts in the cells lining the ducts of the breast and invades surrounding breast tissue. “Invasive” means that the cancer has spread beyond the ducts into nearby tissues, and “ductal” refers to the ducts where the cancer …
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Progesterone receptor (PR) is a protein that allows a cell to respond to the actions of the hormone progesterone. After PR protein is made, it stays in a part of the cell called the nucleus. Progesterone hormone that enters the cell can change the behavior of the cell by activating PRs. Not all cells make …
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The estrogen receptor (ER) is a protein found inside and on the surface of certain cells. It is a nuclear hormone receptor that is activated by the hormone estrogen. There are two main types of estrogen receptors: ERα (alpha) and ERβ (beta). When activated by estrogen, these receptors are involved in the transcription of specific …
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