[1] Fdn IRCCS Ist Neurol Carlo Besta, Dept Neurosurg, Milan, Italy
[2] Univ Milan, Milan, Italy
[3] Univ Bologna, Bologna, Italy
[4] Fdn IRCCS Ist Neurol Carlo Besta, Neuropathol Unit, Milan, Italy
[5] Fdn IRCCS Ist Neurol Carlo Besta, Dept Radiosurg, Radiotherapy Unit, Milan, Italy
[6] Fdn IRCCS Ist Neurol Carlo Besta, Neuroradiol Dept, Milan, Italy
[7] Univ Milan, Dept Oncol & Hematol Oncol, Milan, Italy
[8] Johns Hopkins Med Sch, Dept Neurol Surg, Baltimore, MD USA