Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Interventional
Official Title: A Phase II Study of Lenalidomide for Adult Histiocyte Disorders
Brief Summary: This research study is studying a chemotherapy drug Lenalidomide as a possible treatment for one of three histiocyte disorders: Langerhans cell histiocytosis (LCH), Erdheim-Chester disease (ECD), or histiocytic sarcoma (HS).