The T-cell lymphomas are the four types of lymphoma

Lymphoma

Lymphoma is a cancer in the lymphatic cells of the immune system. Typically, lymphomas present as a solid tumor of lymphoid cells. Treatment might involve chemotherapy and in some cases radiotherapy and/or bone marrow transplantation, and can be curable depending on the histology, type, and stage...

 that affect T cell

T cell

T cells or T lymphocytes belong to a group of white blood cells known as lymphocytes, and play a central role in cell-mediated immunity. They can be distinguished from other lymphocytes, such as B cells and natural killer cells , by the presence of a T cell receptor on the cell surface. They are...

s. These account for perhaps one in ten cases of non-Hodgkin lymphoma

Non-Hodgkin lymphoma

The non-Hodgkin lymphomas are a diverse group of blood cancers that include any kind of lymphoma except Hodgkin's lymphomas. Types of NHL vary significantly in their severity, from indolent to very aggressive....

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They can be associated with Epstein Barr virus and Human T-cell leukemia virus-1.

Types

The four classes are:

• Extranodal T cell lymphoma
• Cutaneous T cell lymphoma
  Cutaneous T Cell lymphoma
  Cutaneous T cell lymphoma is a class of non-Hodgkin's lymphoma, which is a type of cancer of the immune system. Unlike most non-Hodgkin's lymphomas , CTCL is caused by a mutation of T cells. The malignant T cells in the body initially migrate to the skin, causing various lesions to appear...
  
  s: Sézary syndrome and Mycosis fungoides
  Mycosis fungoides
  -External links:* * *...
  
  
• Anaplastic large cell lymphoma
  Anaplastic large cell lymphoma
  Anaplastic large-cell lymphoma is a type of non-Hodgkin lymphoma that features in the World Health Organisation classification of lymphomas.Its name derives from anaplasia and large-cell lymphoma.-Signs and symptoms:...
  
  
• Angioimmunoblastic T cell lymphoma

More information on various classification schemes is in the main lymphoma

Lymphoma

Lymphoma is a cancer in the lymphatic cells of the immune system. Typically, lymphomas present as a solid tumor of lymphoid cells. Treatment might involve chemotherapy and in some cases radiotherapy and/or bone marrow transplantation, and can be curable depending on the histology, type, and stage...

 article.

Epidemiology

Of all cancers involving the same class of blood cell

Lymphoproliferative disorders

Lymphoproliferative disorders refer to several conditions in which lymphocytes are produced in excessive quantities. They typically occur in patients who have compromised immune systems...

, 8% of cases are mature T cell lymphomas. Of such cases, 2% are precursor T lymphoblastic and 2% are cutaneous T cell lymphomas.