TNMB (tumor, node, metastasis, blood) classification for patients with mycosis fungoides and Sézary syndrome.
| T (skin) |
| T1 limited patch/plaque (<10% of BSA) |
| T2 generalized patch/plaque (>10% of BSA) |
| T3 tumors |
| T4 generalized erythroderma |
| N (nodes) |
| N0 no clinically abnormal peripheral lymph nodes |
| N1 clinically abnormal peripheral lymph nodes |
| NP0 biopsy performed, not CTCL |
| NP1 biopsy performed, CTCL |
| LN0 uninvolved |
| LN1 reactive lymph node |
| LN2 dermatopathic node, small clusters of convoluted cells (< 6 cells per cluster) |
| LN3* dermatopathic node, large clusters of convoluted cells (> 6 cells per cluster) |
| LN4* lymph node effacement |
| M (viscera) |
| M0 no visceral metastasis |
| M1 visceral metastasis |
| B (blood) |
| B0 atypical circulating cells not present (<5%) |
| B1 atypical circulating cells present (>5%) |
| T (skin) |
| T1 limited patch/plaque (<10% of BSA) |
| T2 generalized patch/plaque (>10% of BSA) |
| T3 tumors |
| T4 generalized erythroderma |
| N (nodes) |
| N0 no clinically abnormal peripheral lymph nodes |
| N1 clinically abnormal peripheral lymph nodes |
| NP0 biopsy performed, not CTCL |
| NP1 biopsy performed, CTCL |
| LN0 uninvolved |
| LN1 reactive lymph node |
| LN2 dermatopathic node, small clusters of convoluted cells (< 6 cells per cluster) |
| LN3* dermatopathic node, large clusters of convoluted cells (> 6 cells per cluster) |
| LN4* lymph node effacement |
| M (viscera) |
| M0 no visceral metastasis |
| M1 visceral metastasis |
| B (blood) |
| B0 atypical circulating cells not present (<5%) |
| B1 atypical circulating cells present (>5%) |