Treatment of severe disseminated juvenile systemic xanthogranuloma with multiple lesions in the central nervous system.

Juvenile xanthogranuloma (JXG), one of the most common forms of Langerhans-dendritic cell proliferation in young children, usually presents as spontaneously regressing cutaneous lesions. JXG with systemic (extracutaneous) involvement is a rare histiocytic disorder in which significant morbidity and death may occur. The systemic type, especially combined with multiple central nervous system lesions in young children, has a very poor prognosis. The patient described here presented with disseminated disease including lungs, liver, kidneys, ribs, scalp, and central nervous system. The patient was treated with multiagent chemotherapy based on the Langerhans cell histiocytosis II treatment protocol. The regimen used included an additional intrathecal therapy with methotrexate and prednisolone to control central nervous system lesions. The patient was treated for 28 months and has been in remission for almost 5 years.