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 VIM and Lymphadenopathy.