The major purpose of this clinical study is to assess clinical outcome of dose-adjusted EPOCH regimen for patients with non-Hodgkin's lymphoma(NHL)-associated hemophagocytic lymphohistiocytosis

Lymphoma-associated hemophagocytic lymphohistiocytosis(LA-HLH) has a high fatality rate and the worst outcome. The major cause of LA-HLH is aggressive non-Hodgkin's lymphoma(NHL), especially T/NKT cell lymphomas. Until now, there is no recommended therapeutic schedule for this fatal disease. Dose-adjusted(DA) EPOCH (etoposide, prednisone, vincristine, cyclophosphamide, and doxorubicin) shows effective activity in patients with aggressive NHL, which also contains the critical drugs for HLH of HLH-94/04. The investigators therefore developed DA-EPOCH regimen to treat non-Hodgkin's lymphoma with hemophagocytic lymphohistiocytosis and assess its clinical outcome including safety and efficacy.

Inclusion Criteria:

1 .Histologically confirmed non-Hodgkin's lymphoma; 2. Patients whose clinical findings satisfy either of HLH 2004 standard: 3. newly-diagnosed and untreated; 4. understand and voluntarily sign an informed consent form, able to adhere to the study visit schedule and other protocol requirements.

HLH2004 standard at least 5 criteria out of the following: Fever ≥ 38.5 ℃ for ≥ 7 days; hepatosplenomegaly; Cytopenias affecting ≥ 2 of 3 lineages in PB Hb < 9 g/L Platelet < 100 x 109 /L ANC < 1.0 x 109 /L; Hypertriglyceridemia and/or hypofibrinogenemia (fasting triglycerides ≥ 265 mg/dL, fibrinogen ≤ 1.5 g/L); Hemophagocytosis in BM or spleen or LN; Low or absent NK-cell activity ( according to local laboratory reference); Serum-ferritin ≥ 500 mcg/L ; Soluble CD25(sIL-2 receptor) ≥ 2,400 U/ml ; 3.New-diagnosed and untreated; 4.Understand and voluntarily sign an informed consent form, able to adhere to the study visit schedule and other protocol requirements.

Exclusion criteria

1. primary HLH;
2. HLH from rheumatic disorder (such as systemic Lupus Erythematosus, adult onset still disease, antiphospholipid antibody syndrome);
3. pregnancy (as determined by serum or urine test) or active breast feeding;
4. concomitant malignancy other than NHL and need to treat;
5. concomitant with other hematologic diseases (such as leukemia, hemophilia primary myelofibrosis) which investigators considered it unsuitable to be enrolled into this clinical trial;
6. any potential drug abuse, medical, psychological or social conditions which may disturb this investigation and assessment;
7. in any conditions which investigator considered ineligible for this study