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'Pathogenesis' is the mechanism by which a certain etiological factor causes disease (''pathos'' = disease, ''genesis'' = development).
Some forms of pathogenesis are:

★ Inflammation

★ Malignancy

★ Tissue breakdown
In most diseases, there are multiple ''pathogenetical'' processes at work. For example, certain cancers arise from dysfunction of the immune system (skin tumors and lymphoma after a renal transplant - which requires immunosuppression).
Often, a potential etiology is identified by epidemiological observations before a pathological link can be drawn between the cause and the disease.

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See also

See also

★ Pathology