Parent term(s)

histiocytosis +

Term with siblings

non-Langerhans-cell histiocytosis +

Langerhans-cell histiocytosis
malignant histiocytic disease
reticulohistiocytic granuloma

Child term(s)

adult xanthogranuloma

Erdheim-Chester disease

juvenile xanthogranuloma

denotes an 'is-a' relationship