Library

Cats + Tumors

  • 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. Most, but not all, are cancerous. A large number of different types of tumor, with a bewildering array of names, but often of confusingly similar appearance, can occur in association with the tissues around the eye.

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

  • Fibrous tissue consists of long fibers of the collagen protein. These fibers form a structural part of specialized tissues such as bone and cartilage.

  • It is important to recognize that multiple tumors in the liver are not always cancers. The livers of older dogs may become nodular without causing any clinical effects.

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