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declarative memory and even to decreased hippocampal   brain  metastases.  New  developments  in  this  field  could
            volumes. [104]   The  severity  of  memory  impairment  is   potentially further expand the treatment spectrum. [108-111]
            correlated to dose and duration of use. [105]
                                                               For meeting these challenges, interdisciplinary and
            Primary prevention strategies might include the    integrative research strategies must combine clinical
            implementation of hippocampal-sparing whole brain   investigation, neurological workup, quality of life
            radiation therapy, prophylactic use of the N-methyl-D-  assessments, neurocognitive testing, imaging, and
            aspartate receptor modulator memantine, or blocking the   histological  and  molecular  profiling  of  tumor  tissue  to
            RAAS cascade. Assessment and treatment of depression is   design individualized treatment strategies tailored to
            an important strategy, including appropriate pharmaceutical   patients with CNS metastases. Only then can the full
            or psychological treatments.                       potential of precision therapeutic approaches be exploited
                                                               for improving outcomes for our patients.
            FUTURE PERSPECTIVES
                                                               Financial support and sponsorship
            With increasing incidence of CNS metastases, an    Intramural Funding of the Center for Personalized Medicine
            improvement of existing treatment strategies is    (Demonstratorprojekt “CNSMet”).
            urgently needed. Important steps for meeting this
            important epidemiological  challenge  include systematic   Conflicts of interest
            interdisciplinary multiprofessional treatment teams,   There are no conflicts of interest.
            thorough biosampling and biobank studies for the
            establishment of further biomarkers or therapeutic targets,   REFERENCES
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