CXCR4 and Vestibular schwannoma: Since a systemic therapeutic approach is urgently needed in vestibular schwannoma, especially in NF2-associated vestibular schwannoma, CXCR4 inhibition could be a promising new option with the use of AMD3100 or other more specific CXCR4 inhibitors with fewer side effects, like BL8040 (Bioline, Luckenwalde, Germany)