Long-term outcome of basilar stenosis in Erdheim-Chester disease: A case report.

BACKGROUND: Erdheim-Chester disease (ECD) is a rare form of non-Langerhans cell histiocytosis. This inflammatory myeloid neoplasm is frequently complicated by neurological symptoms, but stroke is an exceptional manifestation of this disease.

METHODS: We report the case of a 59-year-old woman who presented a vertebrobasilar stroke secondary to infiltration and severe stenosis of the basilar artery, improved after interferon-alpha therapy. We performed a review of the relevant literature and reported the few other cases described.

RESULTS: With our patient, we have found only 7 observations of cerebrovascular disorder in ECD. Most of them had supravascular arteries involvement.

CONCLUSION: Stroke is a rare treatable and potentially reversible complication of ECD. The pathophysiological processes explaining stroke in this disease are uncertain, but periarterial stenosis of cerebral arteries may be a mechanism.