ANAPLASTIC : It refers to those tumours cells that are completely undifferentiated and bear no resemblance to cells of tissues of their origin.
HYPERPLASIA: It refers to an increase in the number of normal cells ina normal arrangement ina tisue or organ, usually cells in a normal arrangement in a tissue ot organ, usually lead to an increase in the size or part and an increase in functional activity
METAPLASIA: It refers to the replacement of one type of fully differentiated cell by another fully differentiated cell in an other part of the body where the second cell type does not normally occur
DYSPLASIA: It refers to an alteration in the size, shape and organization of differentiated cells; cells lose their regularity and show variability in size and shape, usually in response to an irritant; cells may revert to normal when the irritant is removed, but may transform to neoplasia
METASTASIS: It refers to the ability of neoplastic cells to spread from the original site of tumour to distant organs, spreading as the same cell type as the original neoplastic tissue
CARCINOMA: It refers to a form of cancer that is composed of epithelial cells that tend to infiltrate surrounding tissues and may eventually spread to distant sites.
ONCOGENES: It refers to cancer genes that are altered versions of normal genes
PROTO-ONCOGENES: It refers to repressed oncongenes existing in normal which can be activated by many different factors and cause the host cell to become malignant
TUMOUR: It refers to usually synonymous with neoplasm
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