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Cats + Tumors

  • The histiocyte group of cells are part of the body's immune surveillance system. Cutaneous (reactive) histiocytosis is an uncommon condition of dogs. Cutaneous, reactive histiocytosis is an immune dysfunction, mainly of young dogs and probably due to persistent antigenic stimulation by a variety of antigens (foreign proteins).

  • Cysts are hollow spaces within tissues that contain either a liquid or a solidified material; the contents may be a natural bodily secretion or an abnormal breakdown product.

  • Cytology is the microscopic examination of cell samples. These samples may sometimes be collected from the surface of the lesion under investigation, but more often, the sample is obtained by use of a special needle.

  • Tumors of the intestinal epithelial lining include non-cancerous polyps, benign adenomas and malignant epithelial tumors (adenocarcinomas). The polyps and adenomas may be multiple and cause local obstruction.

  • Muscle (called smooth muscle) and fibrous connective tissues form the framework (stroma) that holds other tissues together within the organs of the body. They enable these organs to contract and stretch as part of their function, for example in digestion of food.

  • Most ear tumors are polyp-like growths that attach to the underlying tissue by a narrow base or a stalk. Some are nodular overgrowths that develop secondary to inflammation but others are benign or malignant cancers of the glands found in this area.

  • These are tumors arising from structures within the eye. The most common intraocular tumors originate from the melanin producing cells (discussed in a separate handout).

  • Melanocytes are cells that produce a pigment called melanin. They are found in many parts of the body where there is pigment, particularly the skin, hair and eyes.

  • A 'tumor' is a lump. Some tumors are cancerous and some are benign. There are several different types of tumors that occur in the tissues around the eye. Many of these tumors have physical effects on the eye, causing soreness, redness and weeping. The most common treatment for tumors around the eye is surgical removal of the lump.

  • Fibrosarcoma is a tumor originating from the fibroblasts of the skin and subcutaneous connective tissue. The tumors vary in growth rate.

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