Prospective Neurobehavioral Functions in Newly-diagnosed Patients With Primary CNS Lymphoma Treated With Hyperfractionated Conformal Whole-brain Radiation Therapy Plus Simultaneous Integrated Boost

Each freshly-diagnosed patient with primary CNS lymphoma will be treated with combined chemoradiation in a sandwiched way, in which 2 cycles of induction chemotherapy with intravenous methotrexate (MTX in a conventional dose of 1g/m2) and intrathecal MTX are followed by a complete course of hyperfractionated WBRT and then high-dose cytarabine for 2 cycles.