Kim et al reported a TNM staging system for a primary cutaneous lymphoma other than mycosis fungoides or Sezary Syndrome. The authors are from multiple institutions from Europe and the United States and are members of the International Society for Cutaneous Lymphoma (ISCL) and the Cutaneous Lymphoma Task Force of EORTC.
Patient selection: primary cutaneous lymphoma, not Sezary or mycosis fungoides
T Status
Description
T1a
solitary lesion < 5 cm in diameter
T1b
solitary lesion >= 5 cm in diameter
T2a
multiple lesions confined to 1 or 2 contiguous body regions; all disease encompassed in a circle < 15 cm in diameter
T2b
multiple lesions confined to 1 or 2 contiguous body regions; all disease encompassed in a circle 15 to 30 cm in diameter
T2c
multiple lesions confined to 1 or 2 contiguous body regions; all disease encompassed in a circle > 30 cm in diameter
T3a
multiple skin lesions involving 2 noncontiguous body regions
T3b
multiple skin lesions involving >= 3 body regions
N Status
Description
N0
no lymph node involvement (clinical and/or pathologic)
N1
1 peripheral lymph node region that drains an area of current or prior skin involvement
N2
2 or more peripheral lymph node regions
N3
involvement of central lymph nodes
where:
• Central lymph node sites: mediastinal, pulmonary, hilar, para-aortic, iliac
M Status
Description
M0
no extracutaneous, non-lymph node disease
M1
extracutaneous disease not involving a lymph node
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