An angioleiomyoma is a noncancerous tumor made of smooth muscle cells, the same type of muscle found in the walls of blood vessels. Under the microscope, the tumor cells form bundles wrapped around many small blood vessels, a feature that defines this diagnosis. Angioleiomyomas usually develop in the deep layer of the skin or in …
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Classic follicular lymphoma is a type of blood cancer that starts in B cells — specialized white blood cells that normally help the body fight infection. It is the second most common lymphoma in adults and is considered an indolent, or slow-growing, cancer. Most people are diagnosed when they notice a painless lump or swelling, …
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What is plasmablastic lymphoma? Plasmablastic lymphoma (PBL) is a rare and aggressive type of immune system cancer and a type of non-Hodgkin lymphoma (NHL). The tumour is made up of plasma cells that arose from B cells. What are the symptoms of plasmablastic lymphoma? The symptoms of PBL depend on where in the body the …
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Aggressive B cell lymphoma is a term used to describe a group of immune system cancers made up of cells called B cells. Although this is considered enough to establish a formal diagnosis, additional tests might be needed to refine how best to group or subclassify the disease. What types of B cell lymphoma are …
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An inflammatory myofibroblastic tumor, often shortened to IMT, is a rare tumor made of long, thin cells called myofibroblasts, mixed with many immune cells. It can start almost anywhere in the body, but it is most often found in the lungs and in the abdomen and pelvis, including the bladder. It is most common in …
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Pseudosarcomatous myofibroblastic proliferation is a noncancerous tumor made of long, thin cells called myofibroblasts. It most often occurs in the bladder, but it can also occur elsewhere in the urinary tract and in the female genital tract. The word “pseudosarcomatous” means the tumor can look like a type of cancer called a sarcoma under the …
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A postoperative spindle cell nodule is a noncancerous, or benign, growth that forms in tissue that is healing after a surgery or procedure. It is made of long, thin cells called spindle cells, which are part of the body’s normal repair process. Most postoperative spindle cell nodules are found in the bladder, the prostate, or …
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Extranodal NK/T cell lymphoma is a rare, fast-growing cancer of the immune system. It starts in either natural killer (NK) cells or T cells, two closely related types of white blood cells that normally identify and destroy infected or abnormal cells. The word “extranodal” means that the lymphoma typically begins outside the lymph nodes, most …
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What is a bile duct adenoma? A bile duct adenoma is a noncancerous type of tumour found in the liver. It is made up of bile ducts, small channels that help move bile and other substances out of the liver. What causes a bile duct adenoma? We do not know what causes a bile duct …
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Cholangiocarcinoma is a cancer that starts in the bile ducts — the network of small tubes that carries bile from the liver and gallbladder to the small intestine, where bile helps digest fats. It is sometimes called bile duct cancer. Cholangiocarcinoma can begin anywhere along this network, and where the cancer starts has an important …
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