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Cats + Cancer & Tumors

  • All tissues and organs of the body may develop cancer (an abnormal overgrowth of their constituent cells).

  • Cysts are hollow spaces containing liquid or solidified secretion. A few cysts form within cancers but only non-cancerous cysts are considered here.

  • Muscle (called smooth muscle) and fibrous connective tissues form the framework (stroma) that holds other tissues together in the organs of the body. A number of different tumours can develop from the cells of these tissues.

  • These tumours are polyp-like growths with a narrow base or a stalk. Some are nodular overgrowths secondary to inflammation but others are benign or malignant cancers of the glands found in this area.

  • Tumours of the cortex of the adrenal glands may be overgrowths (hyperplasias) or benign (non-spreading) or malignant (spreading) cancers. Usually they are producing hormones that will have secondary clinical effects elsewhere in the body.

  • Tumours of the medulla of the adrenal glands may be hyperplasias (non-cancerous cell overgrowths) or be cancerous. Few are diagnosed until late in the disease because, unlike tumours of the adrenal cortex, medullary tumours do not produce clinical signs.

  • These are tumours arising from structures within the eye. They tend to result in an increase in the internal pressure (glaucoma), which then leads to blindness.

  • Melanocytic tumours are formed by abnormal melanocytes. Melanocytoma is a benign (non-spreading) melanoma. Malignant (spreading) tumours are sometimes called melanoma or more specifically malignant melanoma or melanosarcoma.

  • Fibrosarcoma is a tumour originating from the fibroblasts of the skin and subcutaneous connective tissue. The feline sarcoid is a subtype of tumour that is caused by a papilloma (wart) virus.

  • Fits (seizures) or "funny turns" (so-called absences) can be due to many causes. As with any veterinary problem a thorough history and physical examination is the first step.