MR OF INTRACRANIAL LANGERHANS CELL HISTIOCYTOSIS

Langerhans cell histiocytosis (LCH) is a disease of children character ized by idiopathic proliferation of histiocytes in the reticuloendothe lial system. Intracranial LCH involving the brain is uncommon. We pres ent a case of LCH involving the dural venous sinuses and choroid plexu s. Contrast MRI provided an excellent means of identifying the extent of tumor involvement and showed that the patient was at risk for venou s sinus thrombosis.