The small bowel mucosa is a thin, specialized lining that covers the inside of your small intestine, also called the small bowel. The small intestine is a vital part of your digestive system, connecting your stomach to your colon, or large intestine. It is divided into three main sections: Duodenum: This is the first part …
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The colonic mucosa is the inner lining of the colon, a long, tube-shaped organ that forms part of the digestive tract. The colon starts at the end of the small intestine (ileum) and extends to the anal canal. The mucosa helps absorb water and nutrients and also protects the colon by producing mucus. What are …
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A leiomyoma is a benign (non-cancerous) tumour made of smooth muscle cells. Smooth muscle is the type of muscle found in structures such as blood vessels, hair follicles, the gastrointestinal tract, and the uterus. Leiomyomas can develop in the skin (cutaneous leiomyomas) or in deep soft tissues, including muscle and the retroperitoneum or abdominal cavity. …
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Periodic acid Schiff plus diastase or PAS-D is a special stain with various uses by pathologists. It is typically used in combination with the routine hematoxylin and eosin (H&E) stained slide. Common uses for PAS-D include: Intracellular mucin: PAS-D can help a pathologist differentiate between glycogen and mucin. When a PAS-D-stained slide is examined under …
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Periodic acid Schiff (also known as PAS) is a special stain test performed by pathologists to look for two types of chemicals in a tissue sample: a type of sugar called glycogen, and a type of protein called mucin. Pathologists often perform a PAS stain when they are trying to determine if the cells in …
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Grocott (also known as GMS) is a special stain test performed by pathologists to look for fungal microorganisms in a tissue sample. The most commonly identified fungal microorganisms are Candida and Pneumocystis. GMS may also be used to look for some types of bacteria, such as Actinomyces and Nocardia. When a GMS-stained slide is examined …
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What is mucicarmine? Mucicarmine is a special stain test (using a colouring stain) performed by pathologists to look for a type of protein called mucin. Mucin is made by specialized epithelial cells and it helps protect cells from damage. Mucin-producing cells are very common in the digestive tract (notably the colon) and the respiratory tract …
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Edema is a buildup of clear, watery fluid inside a tissue. It happens when fluid from the blood leaks out of small blood vessels and collects in the tissue around them. When a tissue contains this extra fluid, pathologists may describe it as edematous. Edema is a description of something the pathologist saw, not a …
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Malignant neoplasm is a medical term for a cancerous tumour. It is a general term that includes many different types of cancer. These tumours can start anywhere in the body, and their specific type depends on the kinds of cells found inside them. Some common examples of malignant neoplasms include carcinomas, sarcomas, melanoma, and lymphomas. …
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A benign neoplasm is a medical term used to describe a non-cancerous tumor. The word “neoplasm” means a new growth of cells, and “benign” indicates that this growth is not cancerous. Benign neoplasms can develop in any part of the body, and their specific characteristics depend on the type of cells they contain. Unlike cancerous …
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