The purpose of this study is to evaluate the efficacy and safety of Apatinib for patients with Relapsed Refractory Diffuse Large B Cell Lymphoma.

Patients with relapsed /refractory diffuse large B cell lymphoma usually have a bad prognosis. These patients cannot be treated successfully with the conventional chemotherapy of CHOP. Apatinib is a new type of oral tyrosine kinase inhibitor targeting VEGFR-2.The investigators have been proceeding this trial to evaluate the efficacy and safety of Apatinib in the patients with relapsed refractory diffuse large B cell lymphoma.

Inclusion Criteria:

• Age range 14-70 years old; ECOG performance status 0-2.
• Estimated survival time > 6 months.
• Histological confirmed diffuse large B cell lymphoma.
• Have taken first-line chemotherapy regimen and failed.
• 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.
• 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.