For more information on cutaneous T-cell lymphoma or #YaleMedicine, visit: https://www.yalemedicine.org/conditions/cutaneous-t-cell-lymphoma. Most people are aware of the basic types of skin cancer but not so many have heard of a rare type of lymphoma called cutaneous T-cell lymphoma (CTCL) that is often first noticed because of skin symptoms. Though T-cell lymphoma can also involve the blood, lymph nodes and internal organs, it most commonly affects the skin, causing rash-like patches, itching and sometimes even tumors. T-cell lymphoma is not curable but it is treatable. Yale Medicine's Department of Dermatology offers expert, multidisciplinary care and advanced treatments, including phototherapy for this unusual type of lymphoma.