Table 1 TNM classification descriptors and additional modifiers
From: TNM-O: ontology support for staging of malignant tumours
Descriptor | Values | Meaning |
|---|---|---|
T | 0-4, is, X | Extent of the primary tumour |
N | 0-3, X | Extent of metastasis in regional lymph nodes |
M | 0-1 | Existence of distant metastasis |
Prefix to T, N, M | p, c | Clinical (pre-therapeutical) or pathological (post-surgical assessment) |
Suffix to pNn | (mi) | Micrometastasis (< 0.2 cm) |
Suffix to pNn | (sn) | Sentinel lymph node metastasis |
Suffix to pN0 or pM0 | (i+), (mol+) | Isolated tumour cells, positive findings |
G | X, 1-4 | Histopathological grading |
Suffix to T | (m) | Multiple primary tumours at a single side |
Prefix to c/ p | y | Assessment during multimodal therapy |
Prefix to c/ p | r | Recurrent tumour |
Prefix to c/ p | a | Assessment during autopsy |
L | X, 0-1 | Lymphatic invasion |
V | X, 0-2 | Venous invasion |
Pn | X, 0-1 | Perineural invasion |
C | 1-5 | Validity of the assessment, can follow each of T, N, M |
R | X, 0-2 | Residual tumour |