Treatment of Natural Killer/T Cell Lymphoma-I/II

Inclusion Criteria:

* Age range 14-70 years old; ECOG performance status 0-2; Estimated survival time \> 3 months
* Histological confirmed NK/T cell lymphoma
* 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 CNS metastasis
* History of peripheral nervous disorder or dysphrenia
* patients participating in other clinical trials
* patients taking other antitumor drugs
* patients estimated to be unsuitable by investigator