Successful Treatment of Erdheim-Chester Disease With Coronary Artery Involvement.

Erdheim-Chester disease (ECD) is a rare non-Langerhans histiocytosis and inflammatory myeloid neoplasm with poor prognosis. Symmetric long bone osteosclerosis occurs in nearly all patients, but other organs are often involved. Coronary artery involvement is rare, but was encountered in a patient who experienced angina. Radiologic presentation and histologic findings were consistent with diagnosis of ECD. A soft-tissue mass was found surrounding the right atrium, ascending aorta, and all branches of coronary artery. Interferon-alfa treatment was successful. In conclusion, we recommend coronary artery computed tomography angiography for cardiovascular evaluation of ECD and interferon-alfa to treat ECD.