Proliferative endometrium describes the normal appearance of the lining of the uterus during the first half of the menstrual cycle. The lining is called the endometrium. “Proliferative” means growing, and it refers to the rebuilding of the lining that happens after a period ends. This is a normal finding, not a disease. It is not …
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What is a pilar cyst? A pilar cyst is a non-cancerous growth that starts from a hair follicle in the skin. They are very common and most start on the scalp where they look like a smooth, round bump on the skin. Pilar cysts range in size from a few millimeters to several centimeters. Another …
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What is primary biliary cholangitis? Primary biliary cholangitis (PBC) is an autoimmune disease that damages the bile ducts inside and outside of the liver. The damage is caused by immune cells that attack the bile duct cells and prevent them from working normally. PBC occurs most commonly in middle-aged to elderly women, with over 90% …
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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 group includes both non-cancerous tumours and cancers. Papillary lesion is a preliminary diagnosis. Typically, the entire tumour needs to be removed and examined before a final diagnosis can be …
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A radial scar is a noncancerous (benign) growth in the breast made up of an increased number of glands and ducts arranged around a central area of scar-like tissue. Under the microscope, the glands appear to radiate outward from this center like the spokes of a wheel, which is where the name comes from. Despite …
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Oligodendroglioma is a type of brain tumor that develops from glial cells, the supporting cells of the central nervous system. It belongs to a larger group of tumors called diffuse gliomas. Diffuse gliomas are infiltrative, which means the tumor cells spread into the normal brain tissue around them and cannot be fully separated from it …
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Mucoepidermoid carcinoma is a type of cancer that starts in the salivary glands — the glands that make saliva. It is the most common salivary gland cancer in both adults and children. Mucoepidermoid carcinoma can also start in less common locations, including the lungs, the lining of the sinuses, and other glands of the head …
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A mucinous cystadenoma is a common, noncancerous (benign) type of ovarian tumor. It is made up of one or more fluid-filled spaces called cysts, lined by cells that produce a thick, gelatinous, mucus-like fluid called mucin. Although a mucinous cystadenoma is not cancer and does not spread to other parts of the body, it can …
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Mucinous borderline tumor is a type of ovarian tumor that is not cancer, but is also not a completely benign growth. It belongs to a group of tumors called borderline tumors, which sit between clearly benign tumors and cancer. The behavior of a mucinous borderline tumor falls somewhere between a mucinous cystadenoma, which is a …
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Mature teratoma of the ovary is a noncancerous (benign) ovarian tumor. It is one of the most common ovarian tumors, accounting for about 20% of all ovarian neoplasms, and it can occur at any age, though it is most often diagnosed in women of reproductive age. Mature teratoma is also known as a mature cystic …
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