asbestos: combination of several minerals that separate into long, threadlike fibers. Because they do not burn, do not conduct heat or electricity, and are very resistant to chemicals, these minerals are often used for making fireproof materials, electrical insulation, roofing, filters, etc. benign: doing no harm, good incidence: the frequency with which an event occurs (usually in a group at risk) pericardium: a thin membrane surrounding the heart and the roots of the great blood vessels.
peritoneum: a thin membrane that covers the abdominal cavity and partially covers some of the abdominal organs.
pleura: a thin membrane that covers the lungs (visceral pleura) and lines the chest cavity (parietal pleura) malignant: harmful, dangerous (a malignant tumor is a cancer).
median: middle number in a series of numbers (for example: median survival of 10 months means that for that specific group of patients the survival varied from probably 2 months to 30 months).
mesoderm: the middle layer of cells in an embryo, from which the muscular, skeletal, vascular, connective etc. tissues develop.
mesothelioma: a tumor of the mesothelium, that can be benign (localized) or malignant (diffusely spread), and that is most commonly caused by the ingestion of asbestos particles.
mesothelium: the thin layer of mesodermal epithelial cells that forms the pleura, peritoneum, pericardium.
metastases: the spread of tumor cells from one part of the body to another unrelated part of the body by the way of the bloodstream or lymphatics.
prognosis: prediction of the probable course of the disease in an individual. Prognostic factors are factors associated with prognosis.
TNM staging: assigning a stage to the tumor based on size, local versus disseminated growth, lymph node involvement and presence or absence of distant metastases.
tumor: a mass of tissue, a growth independent of its surrounding structures and having no physiological function/ a neoplasm. A tumor can be benign or malignant.
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