However, this cancer is harder to detect on mammograms and other exams than IDC. One in five women with ILC have both breasts affected. Inflammatory breast cancer , which may be detected in the ducts or lobules, tends to spread faster than other types of breast cancer. This quick-growing, aggressive disease makes up about 1 to 5 percent of breast cancers in the United States, according to the NCI. It gets its name from the inflammatory signs it causes, usually redness and swelling on the surface of the breast.
For these reasons, inflammatory breast cancer has a lower survival rate. It primarily affects about 1 to 4 percent of patients also diagnosed with another breast cancer, according to the NCI. It develops in the skin of the nipple and the areola, creating unique tumor cells called Paget cells. Angiosarcoma is breast cancer that forms in the lining of lymph or blood vessels. Phyllodes tumors are rare and are found in the connective tissues of the breast. This type of tumor mostly affects women in their 40s, though it may develop in patients of all ages.
People who have an inherited genetic condition called Li-Fraumeni syndrome are at an increased risk for this type of tumor. About 25 percent of phyllodes tumors are cancerous, according to the ACS. Other, even more rare, types of invasive breast cancer include adenoid cystic carcinoma, low-grade adenosquamous carcinoma, medullary carcinoma, mucinous carcinoma, papillary carcinoma and tubular carcinoma.
Noninvasive in situ breast cancer cells remain in a particular location of the breast, without spreading to surrounding tissue, lobules or ducts. Breast cancer that does not spread beyond the milk ducts or lobules is known as in situ.
The two types of in situ cancers are ductal carcinoma and lobular carcinoma. DCIS starts out as a mass that grows in a milk duct, which carries milk from the lobules, or glands, to the nipple. Over time, chances increase for the mass to break through the ductal walls into the surrounding tissue and fat of the breast.
With advances in diagnostics and treatments, however, most patients treated for DCIS, also called stage 0 breast cancer, have positive outcomes. An LCIS is technically not considered cancer, but rather a change in the breast.
They are the most common benign lumps in women and can occur at any age. They are increasingly being seen in postmenopausal women who are taking hormone therapy.
The painless lump feels rubbery and moves around freely. You may find one yourself. Fibroadenomas vary in size and can grow anywhere in the breast tissue. Your healthcare provider may diagnose this type of lump simply by feeling it. But, he or she will want to confirm the diagnosis with a mammogram or ultrasound and fine-needle aspiration. Sometimes, in very young women, the fibroadenoma is not removed. However, since sometimes these tumors enlarge with pregnancy and breastfeeding, your provider may suggest having it surgically removed.
While most fibroadenomas do not lead to cancer, there is a type of fibroadenoma that has been linked to an increased risk of cancer, particularly in women with a family history of the disease.
Fat necrosis is a condition in which painless, round, firm lumps caused by damaged and disintegrating fatty tissues form in the breast tissue. Fat necrosis often occurs in women with very large breasts or who have had a bruise or blow to the breast. This condition may also be the result of a lumpectomy and radiation from a prior cancerous lump. In some cases, healthcare providers will watch the lump through several menstrual cycles.
Read more about locally advanced breast cancer. Metastatic breast cancer, also known as advanced, secondary or stage 4 breast cancer, is breast cancer that has spread to more distant parts of the body such as the bones, liver or lungs. Read more about metastatic breast cancer. Back to top. Most people with hormone positive breast cancer will be recommended hormone-blocking therapy such as tamoxifen, anastrozole or letrozole.
HER2-positive breast cancer cells have too much of the protein called human epidermal growth factor receptor 2 on the surface of the cancer cells. These excess HER2 receptors promote the growth of the cancer cells. HER2-positive breast cancer may be either hormone receptor positive or negative. HER2-positive breast cancers are treated with the drug Herceptin trastuzumab , which specifically targets HER2-positive breast cancer and has been proven to be a very effective treatment.
They may also be offered 12 months of Nerlynx neratinib , an oral medication used to treat HER2-positive breast cancer. If the breast cancer is also hormone receptor positive, hormone-blocking therapy may be recommended.
Triple negative breast cancer does not have any of the three receptors commonly found on breast cancer cells oestrogen, progesterone and HER2. Around 15 per cent of breast cancers are triple negative and chemotherapy is generally recommended for these cancers. Read more about triple negative breast cancer. Types of breast cancer.
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See more conditions. Breast cancer types: What your type means. Products and services. Breast cancer types: What your type means Not all breast cancers are the same. By Mayo Clinic Staff. Open pop-up dialog box Close. Breast anatomy Each breast contains 15 to 20 lobes of glandular tissue, arranged like the petals of a daisy.
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