Definition of TNM staging system - NCI Dictionary of Cancer Terms

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TNM staging system (... STAY-jing SIS-tem)

A system for describing the extent of cancer in a patient’s body. T describes the size of the tumor and whether it has invaded nearby tissue, N describes any lymph nodes that are involved, and M describes metastasis (spread of cancer from one body part to another).

Previous Definitions:	TLK286, TM, TNF, TNF-bound colloidal gold, TNFerade
Next Definitions:	TNP-470, tobacco, tocladesine, tomography, tonga