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Table 1 classification of cutaneous T-cell lymphoma (CTCL)

From: Total skin electron beam therapy as palliative treatment for cutaneous manifestations of advanced, therapy-refractory cutaneous lymphoma and leukemia

T-classification Description
  T0 Clinically and/or histopathologically suspicious lesions
  T1 Limited plaques, papules, or eczematous patches covering <10% of the skin surface
  T2 Generalized plaques, papules, or erythematous patches covering 10% or more of the skin surface
  T3 Tumors, one or more
  T4 Generalized erythroderma
N-classification  
  N0 No clinically abnormal peripheral lymph nodes; pathology negative for CTCL
  N1 Clinically abnormal peripheral lymph nodes; pathology negative for CTCL
  N2 No clinically abnormal peripheral lymph nodes; pathology positive for CTCL
  N3 Clinically abnormal peripheral lymph nodes; pathology positive for CTCL
M-classification  
  M0 No visceral organ involvement
  M1 Visceral involvement (must have pathology confirmation and organ involved should be specified)