The Histiocytosis Association is a global nonprofit organization dedicated to addressing the unique needs of patients and families dealing with the effects of histiocytic disorders while leading the search for a cure. It is the only organization of its kind, connecting the patient and medical communities to: 1) Grow and share knowledge of histiocytic disorders, 2) Provide critical emotional and educational support to patients and families, and 3) Identify and fund key research initiatives that will lead to a world free of histiocytic disorders.