Chidamide With R-CHOP Regimen for DLBCL Patients

Inclusion Criteria:

1. Diagnosed as diffuse large B-cell Lymphoma with positive CD20 results;
2. Age between 18 to 75 years old;
3. World health organization-Eastern Cooperative Oncology Group Performance Status (ECOG) 0-2;
4. No history of malignant tumors, having no tumor other than DLBCL at the time of enrollment;
5. Life expectancy no less than 6 months
6. The patient or his/her attorney would be able to provide written consent for necessary examinations or procedures;
7. IPI mark\>1.

Exclusion Criteria:

1. History of autologous stem cell transplantation;
2. History of other malignant tumors, except skin basal cell carcinoma and in situ cervical cancer;
3. With uncontrolled cardiovascular/ cerebrovascular disease, coagulation disorders, connective tissue disease, severe infectious diseases;
4. Lymphoma originated in the central nervous system;
5. Left ventricular ejection fraction ≦50％
6. Abnormal lab results in enrollment:

   1. Neutrophil count: \<1.5\*109/L；
   2. Platelet count \<75\*109/L；
   3. AST or ALT \>2 times the upper limit of normal level，AKP and total bilirubin \>1.5 times the upper limit of normal level;
   4. serum creatinine \>1.5 times the upper limit of normal level;
7. Other uncontrolled medical conditions which the investigators think might influence the results of the trial;
8. Patients with mental illnesses or other diseases that might not comply with the trial plan;
9. Women during pregnancy or lactation;
10. HIV positive patients;
11. HbsAg (+) patients with HBV DNA(+), can be enrolled only when his/her HBV DNA turns negative; patients with HBsAg(-) HBcAb(+) can be enrolled only when his/her HBV DNA turns negative;