Generated by OntoTerm. Updated: 03/09/2002 18:27:20
MALIGNANT-NEOPLASM-BY-BODY-PART
Definition: general term used to refer to different forms of disease characterised by uncontrolled, abnormal growth of cells in the body that can spread to other parts in the body . The diagnosis of cancer usually depends upon the observation of abnormal microscopic features in biopsies, i.e. tissue removed surgically for such examination.
Cancers are classified according to the type of cell from which they are derived as well as the organ of origin. For example, cancers arising within the bronchi, often collectively referred to as 'lung cancer', include both adenocarcinomas (derived from glandular epithelium) and squamous carcinomas (derived from squamous epithelium. Sarcomas are cancers of connective tissue, including bone and cartilage. The behaviour of cancers and their response to therapy vary widely depending on numerous other factors such as growth rate, differentiation in cell and characteristics and size at the time of presentation. Early diagnosis is important for the success of treatment.