| Ch 6 | Page 8 / 10 | |
| Cancer Classification |
TNM Classification | |
This classification may be:
This criterion concerns the primitive tumour
| T |
Description |
| T x | The primitive tumour cannot be studied |
| T 0 | There is no primitive tumour |
| T 1 | Very limited primitive tumour |
| T 2 | Larger tumour (generally more than 2 cm in diameter) |
| T 3 | Tumour with extension to adjacent connective tissue (fixed tumour) |
| T 4 | Extension to adjacent structures. |
This criterion concerns the regional nodes
| N |
Description |
| N x | It is not possible to describe the node status |
| N 0 | The research for satellite nodes is negative |
| N 1 | Minimal invasion of regional nodes |
| N 2 | Major invasion of regional nodes |
| N 3 | Node invasion beyond regional nodes |
This criterion describe the presence of metastases.
| N |
Description |
| M x | It is not possible to describe the metastasis status |
| M 0 | There are no remote metastases |
| M 1 | There are one or many remote metastases. |
A prefix can be used to describe multiple metastases (mM).
The localisation of the metastases is described by suffix:
This component describes the histological grading of epithelial tumours.
| G |
Description |
| G x | No precision about histological grading |
| G 1 | Well differentiated tumour |
| G 2 | Moderately differentiated tumour |
| G 3 | Poorly differentiated or undifferentiated tumour |
It describes the serum tumour markers and is used for testicular cancer (described later).
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