| pTNM (pathological classification) | ||
| pT | ||
| pN | ||
| pM | ||
| Note: These categories correspond to the T, N and M categories | ||
| G (histopathological grading) | ||
| Gx: | grade cannot be assessed | |
| G1: | well differentiated | |
| G2: | moderately differentiated | |
| G3: | poorly differentiated | |
| G4: | undifferentiated | |
| R (residual tumor) | ||
| Rx: | presence of residual tumor cannot be assessed | |
| R0: | no residual tumor | |
| R1: | microscopic residual tumor | |
| R2: | macroscopic residual tumor | |
| L (lymphatic invasion) | ||
| Lx: | lymphatic invasion cannot be assessed | |
| L0: | no lymphatic invasion | |
| L1: | microscopic lymphatic invasion | |
| L2: | macroscopic lymphatic invasion | |
| V (venous invasion) | ||
| Vx: | venous invasion cannot be assessed | |
| V0: | no venous invasion | |
| V1: | microscopic venous invasion | |
| V2: | macroscopic venous invasion | |
From: Carcinoma of the lung
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