Orbital histiocytic proliferations
| Secondary to ruptured cyst or trauma |
| Sinus histiocytosis with massive lymphadenopathy |
| Necrobiotic xanthogranuloma |
| Erdheim-Chester disease |
| Juvenile and adult xanthogranuloma |
| Langerhan’s cell histiocytosis |
| Familial haemophagocytic lymphohistiocytosis |
| True histiocytic lymphoma |