Erdheim-Chester Disease with Renal Mass Presentation: Report of the First Case From Palestine and a Review of the Literature.

BACKGROUND Erdheim-Chester disease (ECD), a form of non-Langerhans-cell histiocytosis, is extremely rare. The mean age of individuals with ECD is in their 50s. Histiocytic infiltration of vital organ systems is a potential cause of substantial morbidity, which is associated with the multisystemic form of ECD.