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  • Title: Tumours and dysplasias of the mammary gland.
    Author: Hampe JF, Misdorp W.
    Journal: Bull World Health Organ; 1974; 50(1-2):111-33. PubMed ID: 4371737.
    Abstract:
    As mammary tumours occur frequently in the dog and cat but rarely in other domestic animals, only the tumours of these two species are classified. The epithelial tumours are termed "complex" when they consist of cells resembling both secretory and myoepithelial cells: these tumours are biologically less malignant than tumours of the "simple" type in which only one of these kinds of cell is present. The carcinomas are subdivided into adenocarcinoma, solid carcinoma, spindle cell carcinoma, anaplastic carcinoma, squamous cell carcinoma, and mucinous carcinoma. The term "carcinosarcoma or malignant mixed tumour" was used only when there were cells morphologically resembling not only one or both of the epithelial components but also connective tissue cells with their products of differentiation. The benign tumours are classed as adenoma, papilloma, fibroadenoma, or benign soft tissue tumour. The dysplasias are described under the following headings: cyst, adenosis, regular typical epithelial proliferation in ducts and lobules (epitheliosis), duct ectasia, fibrosclerosis, and lobular hyperplasia.
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