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Mature T-cell or NK-cell lymphomas and lymphoproliferative disorders, primary cutaneous specified types

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Primary cutaneous T-cell lymphomas (CTCL) and NK-cell lymphomas are malignant lymphoproliferative diseases of unknown cause that are thought to originate from T-lymphocytes in the lymphoid tissue of the skin and by definition are confined to the skin at initial diagnosis. Included in the class is also a small number of lymphoma-like primary cutaneous lymphoproliferative disorders which are not considered to be truly malignant.

exclusions

• Skin infiltration by nodal or non-cutaneous extranodal lymphoma  (2E08)

sections/codes in this section (2B00-2B0Z)

• Subcutaneous panniculitis-like T-cell lymphoma  (2B00)
• Mycosis fungoides  (2B01)
• Sézary syndrome  (2B02)
• Primary cutaneous CD30-positive T-cell lymphoproliferative disorders  (2B03)
• Other specified primary cutaneous mature T-cell or NK-cell lymphomas and lymphoproliferative disorders  (2B0Y)
• Primary cutaneous T-cell lymphoma of undetermined or unspecified type  (2B0Z)

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