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Integumentary System
TNM System of Staging
Term | Definition |
---|---|
Tumor; TX | primary tumor that cannot be evaluated |
Tumor; T0 | no evidence of tumor |
Tumor; Tis | Stage I; Carcinoma in situ, which indicates that the tumor is in a defined location and shows no invasion into surrounding tissues |
Tumor; T1, T2, T3, T4 | Stage II; Primary tumor size and extent of local invasion, where T1 is small with minimal invasion and T4 is large with extensive local invasion into surrounding organs and tissues |
Node; NX | regional lymph nodes that cannot be evaluated |
Node; N0 | regional lymph nodes that show no abnormalities |
Node; N1, N2, N3, N4 | stage III; degree of lymph node involvement and spread to regional lymph nodes, where N1 is less involvement with minimal spreading and N4 is more involvement with extensive spreading |
Metastasis; MX | distant metastasis that cannot be evaluated |
Metastasis; M0 | no evidence of metastasis |
Metastasis; MI | stage IV; presence of metastasis |