Cutaneous T-cell Lymphomas (CTCL) (Mycosis Fungoides; Sézary Sydrome) By Peter Martin, MD, Weill Cornell Medicine; John P Leonard, MD, Weill Cornell Medicine Reviewed / Revised May 2022 | Modified Sep 2022 View Patient Education Diagnosis Prognosis Treatment More Information Topic Resources Mycosis Fungoides (Back) Mycosis Fungoides (Trunk... Mycosis Fungoides (Buttocks) Mycosis Fungoides (Chest) Mycosis Fungoides with Ulceration Mycosis fungoides and Sézary syndrome are uncommon chronic T-cell non-Hodgkin lymphomas primarily affecting the skin and occasionally the lymph nodes.