Imatinib Mesylate for Cerebral Langerhans'-Cell Histiocytosis

Abstract
Langerhans'-cell histiocytosis (LCH) is a rare disorder characterized by tissue infiltrates of CD1a+ Langerhans' cells, eosinophils, neutrophils, macrophages, and lymphocytes. Systemic treatments for refractory LCH are unsatisfactory and usually toxic. We report the use of imatinib mesylate to control parenchymal brain involvement in a patient with multisystem LCH.