Papillary adenoma is a small, benign (noncancerous) tumor of the kidney. It arises from the tiny tubes inside the kidney called tubules, and it grows in small finger-like projections called papillae, sometimes in small tubes, or in a mixture of the two. It is one of the most common tumors found in the kidney, and …
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Chronic active enteritis refers to ongoing (chronic) inflammation in the small intestine, accompanied by recent (active) inflammation. Pathologists use this term after examining a tissue sample under a microscope. They observe a mixture of immune cells that indicates inflammation has been present for an extended period and is currently active. They may also see specific …
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Chronic enteritis refers to long-lasting inflammation of the small intestine. When examining a tissue sample under a microscope, pathologists identify chronic enteritis by seeing increased numbers of specific immune cells, particularly lymphocytes and plasma cells. The presence of these immune cells means the inflammation has been present for an extended period—weeks, months, or even years. …
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Active enteritis refers to inflammation of the small intestine, involving specialized immune cells known as neutrophils. This finding suggests recent or ongoing irritation, infection, or injury to the intestinal lining. Pathologists identify active enteritis by examining tissue samples from your intestine under a microscope. What are the symptoms of active enteritis? Symptoms of active enteritis …
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Enteritis means inflammation of the small intestine. When your intestine becomes irritated or inflamed, it can lead to symptoms like abdominal pain, diarrhea, and difficulty absorbing nutrients. Pathologists use the term “enteritis” when they examine tissue samples from the intestine and notice inflammation. What are the symptoms of enteritis? Symptoms of enteritis can vary depending …
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Intraepithelial lymphocytosis describes an abnormally high number of lymphocytes — a type of immune cell — found within the epithelium, which is the thin layer of cells that lines the inner surfaces of organs such as the intestines, stomach, cervix, and airways. A small number of lymphocytes in the epithelium is normal, but when their …
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The term micropapillary refers to a specific pattern of tumor growth that pathologists observe when examining tissue samples under a microscope. In a micropapillary pattern, tumor cells form very small, finger-like or rounded clusters. These clusters typically float within empty spaces, giving a distinctive appearance. The word “micro” indicates that these growth patterns are very small, while …
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Polypoid means shaped like a polyp. Pathologists and other doctors use the term to describe a growth or area of tissue that sticks up from a surface, forming a rounded bump or mushroom-like projection. It describes the shape of a growth, not what the growth is. The word polypoid does not indicate whether a growth is benign (noncancerous), …
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Hypocellular marrow is a medical condition characterized by a bone marrow that has fewer blood-forming cells than normal. Bone marrow is a soft, spongy tissue found inside your bones, responsible for producing red blood cells, white blood cells, and platelets. These cells are crucial because red blood cells carry oxygen, white blood cells fight infections, …
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IgA nephropathy, also known as Berger’s disease, is a kidney condition in which an antibody called immunoglobulin A (IgA) builds up in the kidney’s filtering units and causes inflammation. Antibodies are proteins the immune system normally makes to fight infection. In IgA nephropathy, an abnormal form of IgA accumulates in the kidneys, triggers inflammation, and, …
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