To explore the safety, tolerability, and clinical effects of decitabine combined with Second-line chemotherapy regimens for patients with relapsed or refractory T-lymphoblastic lymphoma.

This is a prospective, open，investigator initial clinical trial with a single arm, aimed to evaluate the safety, tolerability, and efficacy of decitabine combined with Second-line chemotherapy regimens (CODOX-M/IVAC) in relapsed or refractory T-lymphoblastic lymphoma. A total of 40 patients are planned to be enrolled into the study. Patients with diagnosis of relapsed or refractory T-lymphoblastic lymphoma will be treated with decitabine plus CODOX-M/IVAC. The primary end point is responder rate (RR) and time to progression (TTP), and the secondary end points include overall survival (OS) and the median survival time (MST).

Inclusion Criteria:

• age: 14~60 years; ECOG rate ≤ 2; expected survival > 3 months;
• patients with T-lymphoblastic lymphoma diagnosed by histopathology detection;
• patients ever received chemotherapy and/or radiotherapy;and can not be transplanted hematopoietic stem cells;
• patients with no chemotherapy contraindications: hemoglobin ≥ 90 g/L, absolute neutrophil count ≥1.5 x 109/L, blood platelet ≥100 x 109/L, ALT and AST ≤ 2-fold upper normal limit, serum bilirubin ≤ 1.5-fold upper normal limit, serum creatinine ≤ 1.5-fold upper normal limit, serum albumin ≥ 30 g/L, normal serofibrinogen;
• at least one measurable nidus;
• no other severe diseases conflict with this project, cardiopulmonary function is basically normal;
• the urine or blood pregnancy test of women in childbearing age must be negative in 7 days before follow-up visit;
• applicable for follow-up visit;
• no other antitumor adjoint therapy (including antitumor Chinese medicine, immunotherapy and biotherapy), but double phosphate anti-bone transfer therapy and other symptomatic treatment are acceptable;
• understanding this study and assigning informed consent.

Exclusion Criteria:

• rejecting providing blood preparation;
• allergic to drug in this study and with metabolic block;
• rejecting adopting reliable contraceptive method in pregnancy or lactation period;
• uncontrolled internal medicine disease (including uncontrolled diabetes, severe incompetence cardiac, lung, liver and pancreas);
• with severe infection;
• with primary or secondary central nervous system tumor invasion;
• with immunotherapy or radiotherapy contraindication;
• ever suffered with malignant tumor;
• having peripheral nervous system disorder or dysphrenia;
• with no legal capacity, medical or ethical reasons affecting research proceeding;
• participating other clinical trials simultaneously;
• adopting other anti-tumor medicine excluding this research;
• the researchers considering it inappropriate to participate in the study.