NCCN Guidelines for Patients
Mycosis Fungoides, Version 1.2016
Mycosis fungoides basics
• The lymphatic system consists of lymph and
a network of vessels and organs. It helps kill
germs in the body and transports fluids to the
• Lymphomas are cancers that start in
lymphocytes within the lymphatic system.
Mycosis fungoides is a cancer of T-cells that
collect in the skin.
• The most common symptom of mycosis
fungoides is skin lesions.
• One or more skin biopsies are needed to
diagnose mycosis fungoides.
• The biopsy tissue should be tested by a
dermatopathologist, hematopathologist, or
both. The pathologist will study your skin cells
with a microscope and may test for surface
proteins, Sézary cells in blood, and abnormal