Ductal adenocarcinoma is the most common type of pancreatic cancer. It starts from the cells that line the small tubes (ducts) inside the pancreas. These cells normally help carry digestive fluids made by the pancreas into the small intestine. In ductal adenocarcinoma, cells begin to grow abnormally and invade surrounding tissue. Over time, the cancer may spread …
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High grade squamous intraepithelial lesion (HSIL) is a precancerous condition of the cervix caused by infection with human papillomavirus (HPV). It is composed of squamous cells infected and altered by the virus. These abnormal cells are found in the transformation zone, the part of the cervix where glandular cells are gradually replaced by squamous cells. …
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Dedifferentiated liposarcoma is an aggressive type of sarcoma — a cancer that arises from fat cells. It is called dedifferentiated because it develops from within a less aggressive fatty tumor called well-differentiated liposarcoma (also known as atypical lipomatous tumor). During this transformation, a portion of the tumor’s fat cells are replaced by a completely different …
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Pleomorphic adenoma is a noncancerous tumor that starts in the salivary glands — the glands that make saliva. It is the most common salivary gland tumor of any kind, in both adults and children, and accounts for about two-thirds of all salivary gland tumors. The name “pleomorphic” means “many shapes” and refers to the mix …
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Follicular lymphoma is a group of closely related blood cancers that start in B cells — specialized white blood cells that normally help the body fight infection. These cancers are called “follicular” because the abnormal cells grow in round clusters called follicles, resembling the normal structures found inside healthy lymph nodes. Follicular lymphoma is the …
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Serous tubal intraepithelial carcinoma — usually called STIC — is a pre-invasive form of cancer that develops in the lining of the fallopian tube. “Intraepithelial” means the abnormal cells are confined to the thin surface layer of the tube and have not grown into the deeper tissue beneath it. Because the cells have not broken …
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Seborrheic keratosis is a very common, noncancerous (benign) skin growth. It develops from squamous cells, the flat cells that make up the epidermis (the outer layer of the skin). Seborrheic keratoses become more common with age, and many people develop several over time. This article explains what a seborrheic keratosis is, what the findings in …
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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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