Epidural spinal involvement of Erdheim-Chester disease causing myelopathy.

We present a 25-year-old woman with Erdheim-Chester disease (ECD) presenting with progressive myelopathy from multiple compressive spinal epidural lesions who required cervicothoracic decompression and fusion, and summarize the literature on epidural spinal involvement of ECD. ECD is a rare non-Langerhans histiocytosis affecting multiple organ systems through infiltration and characteristically causing multifocal osteosclerosis. Central nervous system involvement, particularly of the spine, is rare.