Intracranial Rosai-Dorfman disease mimicking melanoma: a case report and review of the literature.

Intracranial Rosai-Dorfman disease is quite rare. Here, we report a 67-year-old man with a 90 day history of pain and numbness in his right limbs. The patient was suspected of suffering from melanoma. Then he received craniotomy and was finally diagnosed with intracranial Rosai-Dorfman disease. MEDLINE was used to search the related literature; and the diagnosis, mechanism, treatment and prognosis of this rare tumor are discussed.