- (1) histology confirmed to be PCNSL. (2) lymphoma invasion in brain, meninges, cerebrospinal fluid, eye organ. (3) ECOG score less than 3 points (4) at least 1 of the lesions can be evaluated with a double diameter. (5) the life expectancy of more than 6 months. (6) less or equal to 75 years,or more or equal to 18 years. (7) to be able to comply with the requirements of the study and follow-up procedures.