What is a corpus luteum cyst? A corpus luteum cyst is a non-cancerous fluid-filled growth in the ovary. These types of cysts are very common in women of reproductive age. What causes a corpus luteum cyst? The corpus luteum is a normal structure that remains in the ovary after ovulation. It is made up of …
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What are cystic follicles and follicle cysts in the ovary? Cystic follicles and follicle cysts are related non-cancerous changes commonly seen when the ovary of a reproductive-age woman is examined under the microscope. Both are created by the growth of a normal structure called a follicle that did not release its ovum (egg) during the …
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What is a bile duct hamartoma? A bile duct hamartoma, also known as a von Meyenburg complex, is a non-cancerous liver tumour made up of disorganized bile ducts. It is a common type of liver tumour seen in approximately 3-6% of the population. Some may appear before birth during the time in fetal development when …
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What is a Schneiderian papilloma? A Schneiderian papilloma is a non-cancerous tumour that starts from the tissue that lines the inside of the nasal cavity and paranasal sinus. Pathologists divide Schneiderian papillomas into three types: inverted, exophytic, and oncocytic. Another name for Schneiderian papilloma is sinonasal papilloma. Is Schneiderian papilloma a type of cancer? No. …
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Immunoreactivity is a term pathologists use to describe how cells or tissues respond to a special laboratory test called immunohistochemistry (IHC). In this test, antibodies are applied to a tissue sample to look for specific proteins. If the protein being tested is present, the antibody will attach to it, and the cells will change color …
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In pathology, a tangentially sectioned tissue sample is one cut at an angle rather than straight across. When a sample is cut at an angle, the layers of tissue overlap in the thin slice placed on the microscope slide. This can make the sample difficult to interpret, and sometimes it prevents the pathologist from seeing …
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Background: Deep fibromatosis or desmoid tumour is a benign (non-cancerous) type of tumour that starts in connective tissue. It is considered locally aggressive because it can grow into surrounding tissues and organs. The tumour can also grow back if not completely removed. However, it will not metastasize (spread) to other body parts. Other names for …
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Squamous cell carcinoma is the most common type of cancer in the oral cavity. It starts from squamous cells — the thin, flat cells that form the inner lining of the mouth. The oral cavity includes the lips, the front two-thirds of the tongue, the inner cheeks (buccal mucosa), the floor of the mouth, the …
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Barrett esophagus is a condition where the normal lining of your esophagus is gradually replaced by a different type of cell. The esophagus is the tube that carries food and liquids from your mouth to your stomach. It is normally lined by squamous cells, which are flat, strong cells built to handle the wear and …
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Atypical endometrial hyperplasia (AEH) is a precancerous condition of the lining of the uterus, called the endometrium. In AEH, the endometrium becomes abnormally thick and the glandular cells that make up the endometrium start to grow in a crowded and irregular pattern. The cells also look abnormal under the microscope, which is why the word …
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