Cutaneous T cell lymphomas (CTCLs) are a group of non-Hodgkin lymphomas that develop from T cells and mainly impact the skin with painful lesions. The two main subtypes of CTCL are mycosis fungoides and Sézary syndrome. CTCLs are extremely rare, with approximately six cases per 1 million people each year. It is unclear how CTCL develops, and unfortunately there are limited treatment options and no cure.