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Lymphocytosis is a term used to describe abnormal accumulations of lymphoid cells in the dermis or subcutaneous tissue of the skin. Occasionally, the term pseudolymphoma is used for these.
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This is a malignant tumour of skin epidermal cells with varying degrees of differentiation. Tumours of this type occur in people and all domestic species.
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Tumours of the epithelial, glandular stomach lining include non-cancerous polyps and some types of chronic (hyperplastic) gastritis. Malignant epithelial tumours (gastric adenocarcinomas) cause progressive illness.
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This tumour is a disordered and purposeless overgrowth of sweat gland cells. Most sweat gland tumours are benign and can be permanently cured by total surgical removal.
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The testicle (testis) contains several different cell types. These include the germ cells, which make sperm, the supporting and nourishing Sertoli cells, and the hormone-producing interstitial (or Leydig) cells.
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Thyroid tumours include cystic structures called goitres, multi-nodular overgrowth (hyperplasia), benign (non-spreading) cancers (adenomas) and malignant (spreading) cancers (carcinomas).
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This is a common tumour, only found in dogs. It has a patchy world-wide distribution including parts of the Caribbean, USA, Southern Europe, Asia and Africa.
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Tumours of the blood cells made in the marrow are rare. There is a continuum from dysplasias (abnormal growths) to cancers (myeloproliferative disease).
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This is a tumour of the lymphatic vessels of the skin or subcutaneous tissue. Some lymphatic tumours are benign (lymphangioma) and some malignant (lymphangiosarcoma).
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Tumours that occur on the haired eyelids are similar to those arising elsewhere in the skin. They include cysts, overgrowths (hyperplasias), benign (non-spreading) and occasionally malignant (spreading) cancers.
