Dendritic cell disorder
- most common disease in the groups is Langerhans Cell Histiocytosis (LCH)
 - includes
 - Juvenile Xanthogranuloma (JXG)
 - Erdheim-Chester disease (ECD)
 
Macrophage cell disorder
- includes
 - Hemophagocytic Lymphohistiocytosis (HLH)
 - Rosai-Dorfman disease (RD)
 
Malignant Histiocytosis
- includes certain kinds of leukemia and malignant tumors
 
The guidelines for diagnosis, treatment, and follow-up have been created by the Histiocyte Society.
Resource: www.histio.org