Columnar cell hyperplasia is a non-cancerous change that can occur in the small structures of the breast called terminal duct lobular units (TDLUs). In this condition, the glands (acini) inside the TDLU become slightly enlarged and are lined by more than two layers of tall, column-shaped cells. This increased layering of cells is what hyperplasia …
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Columnar cell change is a non-cancerous alteration that can occur in the small structures of the breast known as terminal duct lobular units (TDLUs). In this change, the tiny glands (acini) inside the TDLU become slightly enlarged and are lined by cells that are taller than usual, called columnar epithelial cells. In some cases, there …
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Olfactory neuroblastoma is a rare type of cancer that starts in cells normally found high in the nasal cavity. These cells play a role in detecting odors and sending smell-related signals to the brain. This tumour usually begins near the roof of the nasal cavity, close to a thin bone called the cribriform plate, which separates …
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An adrenal cortical adenoma is a benign (non-cancerous) tumour that develops from cells in the outer part of the adrenal gland, the adrenal cortex. The adrenal cortex normally produces hormones that help control blood pressure, salt and water balance, metabolism, and the body’s response to stress. Some adrenal cortical adenomas make excess hormones and cause …
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Urothelial carcinoma in situ (CIS) is a type of non-invasive cancer that starts in the lining of the urinary tract. The urinary tract includes the bladder, kidneys, ureters, and urethra. “In situ” means that the cancer cells are only found in the urothelium (inner lining) and have not spread to deeper tissues. However, if not …
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What is a mitotically active cellular fibroma? A mitotically active cellular fibroma is a non-cancerous type of ovarian tumour. It develops from the stromal cells normally found inside the ovary. These tumours can range in size from less than 1.0 cm to over 20 cm. It is called a ‘mitotically active cellular’ fibroma because the …
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What is a cellular fibroma? A cellular fibroma is a non-cancerous type of ovarian tumour. It develops from the stromal cells normally found inside the ovary. These tumours can range in size from less than 1.0 cm to over 20 cm. It is called a ‘cellular’ fibroma because the density of tumour cells (the number …
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What is an ovarian fibroma? Ovarian fibroma is a non-cancerous type of ovarian tumour. It develops from the stromal cells normally found inside the ovary. These tumours can range in size from less than 1.0 cm to over 20 cm. What are the symptoms of an ovarian fibroma? Most ovarian fibromas do not cause any …
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An inflammatory polyp is a non-cancerous growth that forms on the inner lining of the colon or rectum as a reaction to injury or inflammation. It is not cancer, it is not precancerous, and finding one does not mean cancer is present or likely. These polyps develop when the colon lining is repeatedly damaged — …
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What is a fundic gland polyp? A fundic gland polyp is a non-cancerous growth that develops from the cells lining the inside of the stomach. It is the most common type of polyp in the stomach. Where in the stomach do fundic gland polyps start? The stomach is divided into four parts: cardia, fundus, body, …
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