Treatment of Primary CNS Lymphoma

Inclusion Criteria:Age range 14-60 years old; ECOG performance status 0-2; Estimated survival time \> 3 months Histological confirmed PCNSL None of chemotherapy or radiotherapy has been previously used None of chemotherapy contraindication: hemoglobin ≥ 90 g/dl, neutrophil ≥ 1.5×109/L, platelet ≥ 100×109/L, ALT and AST ≤ 2×ULN, serum bilirubin ≤ 1.5×ULN, serum creatine ≤ 1.5×upper limitation of normal (ULN), Serum Albumin ≥ 30g/L, serum plasminogen is normal (Inclusion Criteria of 1,3,6 groups ) At least one measurable lesion None of other serious diseases, cardiopulmonary function is normal Pregnancy test of women at reproductive age must be negative Patients could be followed up None of other relative treatments including the traditional Chinese medicine, immunotherapy,biotherapy except anti-bone metastasis therapy and other symptomatic treatments. volunteers who signed informed consent. - Exclusion Criteria:Disagreement on blood sample collection Patients allergic of any of drug in this regimen or with metabolic disorder Pregnant or lactating women Serious medical illness likely to interfere with participation Serious infection Primitive or secondary tumors of central nervous system Chemotherapy or radiotherapy contraindication The evidence of peripheral nervous disorder or dysphrenia patients participating in other clinical trials patients taking other antitumor drugs patients estimated to be unsuitable by investigato \-