An oncocytoma of the salivary gland is a rare, benign (non-cancerous) tumor that arises from the salivary glands. The salivary glands produce saliva, which is important for digestion and maintaining oral health. There are three major pairs of salivary glands: the parotid glands, the submandibular glands, and the sublingual glands, along with hundreds of minor …
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Basal cell adenoma is a benign (non-cancerous) tumour of the salivary gland. It is made up of small cells that look similar to normal basal cells, which are found at the base of the glands in the salivary system. Although basal cell adenoma is rare, it is most commonly found in the parotid gland, the …
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Sclerosing adenosis is a noncancerous (benign) change in the breast made up of an increased number of small glands that are surrounded and squeezed by dense, scar-like connective tissue. The name describes exactly what the pathologist sees: “adenosis” means more glands than usual, and “sclerosing” means the scar-like tissue that compresses them. Sclerosing adenosis is …
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Endometrial serous carcinoma is an uncommon and fast-growing cancer that starts in the endometrium, the inner lining of the uterus. It is high-grade by definition, meaning it carries a higher risk of spreading beyond the uterus than most endometrial cancers. It accounts for somewhere between 3 and 10 out of every 100 endometrial cancers, but …
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Chondroblastic osteosarcoma is a type of bone cancer. It is one form of osteosarcoma, the most common bone cancer. All osteosarcomas are made of cancer cells that produce bone. In chondroblastic osteosarcoma, much of the tumor is made of cartilage instead, the firm, smooth tissue found in joints and in the ear. The cancer cells …
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A fibrous histiocytoma is a common noncancerous skin tumor. It is made of fibroblasts, which build connective tissue, histiocytes, which are a type of immune cell, and collagen. It develops in the dermis, the layer of skin beneath the surface. Another name for this tumor is dermatofibroma, and the two terms mean the same thing. …
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High-grade prostatic intraepithelial neoplasia, or HGPIN, is a change in the cells that line the ducts and glands of the prostate gland. In HGPIN, the lining cells look abnormal under the microscope, but they stay within the existing ducts and glands and do not invade the surrounding tissue. HGPIN is not cancer. It is considered …
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Angiomyolipoma is a benign (noncancerous) tumor, most often found in the kidney. It is composed of three types of tissue: fat, smooth muscle, and abnormally shaped blood vessels. These three parts give the tumor its name, from angio (blood vessels), myo (muscle), and lipo (fat). It is the most common noncancerous tumor of the kidney. …
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In pathology, extraparenchymal extension (EPE) refers to the invasion (spread) of a tumor beyond the main tissue mass (the parenchyma) of an organ into surrounding tissues. This term is often used in the context of malignant (cancerous) tumours to describe tumor growth extending beyond the organ’s boundary and into adjacent structures or tissues. Why is …
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What does parenchyma mean? In pathology, the term parenchyma refers to the tissue normally found within an organ. Specifically, it is made up of cells that carry out the specific function of the organ. As a result, the types of cells found in the parenchyma will depend on the organ being examined. For example, the …
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