Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Interventional
Official Title: A Clinical, Structural, and Functional Neuroimaging Study of Cognition in Adults With Erdheim-Chester Disease, Langerhans Cell Histiocytosis, Rosai-Dorfman Disease, and Ot
Brief Summary: The purpose of this study is to try to understand how histopcytosis can cause symptoms or problems in the brain. The tests being done in the study will look at memory and thinking as well as brain function via MRI scan.