Table 1: TMN staging system. Clinical staging system for cutaneous T-cell lymphoma. This classification is designed to select the appropriate treatment at the variant stages of the lymphoma [1517].

T1Plaques and/or patches <10% body surface area
T2Plaques and/or patches ≥10% body surface area
T3≥1 cutaneous tumours
T4Erythroderma
NN0No lymph nodes involved
N1Lymph nodes enlarged without histological involvement
N2Nonpalpable lymph nodes with histological involvement
N3Enlarged lymph nodes with histological involvement
M0No visceral disease
M1Visceral disease
B0No haematological involvement—no atypical (Sézary) cells, <5%
B1Atypical (Sézary) cells circulating, ≥5% of total peripheral lymphocytes