Cutaneous T-cell lymphoma (CTCL) is a type of skin lymphoma. It is a rare type of non-Hodgkin lymphoma. It develops when cells called T-cells (also called T-lymphocytes) become abnormal. T-cells are white blood cells that fight infection. They are part of our immune system. There are different types of CTCL.
https://www.macmillan.org.uk/cancer-information-and-support/lymphoma/cutaneous-t-cell

