Triad of exophthalmos, bone lesions, and diabetes insipidus is a feature of
HSCD is associated with multifocal langerhans cell histiocytosis.
Triad:

Exophthalmos
Lytic bone lesions
Diabetes insipidus.
Hand-schuller christian disease
Craniofacial dysostosis
Mickulicz syndrome
Letterer - sieve disease