- Dendritic Cell disorder
- Letterer-Siwe
- Hand-Schuller-Christian Syndrome
- Histiocytosis X with Bone involvement
- Ages 20-40 years old
- Prior Tobacco use (90%)
- Pneumothorax (10-30%)
- Diabetes Insipidus
- Lytic bone lesions (5-10%)
- None available
- Unpredictable prognosis
- Mortality 2-6%