TNM system for stomach cancer
The American Joint Committee on Cancer (AJCC) developed the TNM staging system for evaluating the extent and spread of stomach cancer. The staging process is a basis for selecting treatment options and helping doctors communicate potential outcomes (prognosis). The TNM system considers three important factors:
- T - Describes the size and growth of the primary stomach tumor.
- N - Provides information about stomach cancer found in regional lymph nodes.
- M - Indicates whether the cancer has metastasized, or spread to other areas.
Each of these categories are rated on a numbered scale, the higher the number indicates increased severity. These categories are then grouped into stomach cancer stages from 0-IV.