It has been reported that EMA and vimentin staining can help to indicate the origin of the meningeal epithelium [7, 12] of tumors and distinguish LPM from other intracranial lesions, such as IHP, choroid meningioma, inflammatory pseudotumor and sinus histiocytosis with massive lymphadenopathy (SHML). This evidence concerns the gene MUC1 and sinus histiocytosis with massive lymphadenopathy.