Metastasis in Greek means displacement.
The term is used to denote the spread of a disease from one organ or part to another non-adjacent organ or part.
Malignant tumor cells and infections have the established capacity to metastasize. Until specified otherwise the term metastasis usually denotes malignant spread.
Why Does Metastasis occur?
Cancer cells can break away, leak, or spill from a primary tumor, enter lymphatic and blood vessels, circulate through the bloodstream, and be deposited within normal tissue elsewhere in the body.
Metastasis is one of three hallmarks of malignant tumors.
Different tumors have different capacity to metastasize.
When tumor cells metastasize, the new tumor is called a secondary or metastatic tumor. This is done to differentiate it from original source or primary tumor.
However, the cells of new secondary tumor are similar to the primary tumor [Read more...]