ATG Could Improve the Outcome Of Hematopoietic Stem Cell Transplant in Patients With Highly Aggressive T Cell Tumors

Inclusion Criteria:

* According to the World Health Organization (WHO) classification, diagnosis of T cell tumor of lymphatic system sources (including peripheral T-cell lymphoma and T lymphoblastoid cell lymphoma/leukemia) confirmed by pathological examination, morphology, cytochemistry, immunophenotyping and chromosome examination, molecular biology including complete remission, partial remission, relapse after remission or refractory recurrent invasive patients
* 18 to 60 years old. Male or female
* Performance status scores no more than 2 (ECOG criteria).
* Adequate organ function as defined by the following criteria:

alanine transaminase （ALT）, aspartate transaminase（AST） and total serum bilirubin \<2×ULN (upper limit of normal)

* Serum creatinine and blood urea nitrogen(BUN) \<1.25×ULN.
* Adequate cardiac function without acute myocardial infarction, arrhythmia or atrioventricular block, heart failure, active rheumatic heart disease and cardiac dilatation(the patients has been improved after treatment of the disease and are not expected to affect transplant can include in the study).
* Absence of any other contraindications of stem cell transplantation.
* Willingness and ability to perform HSCT.
* Signed and dated informed consent document indicating that the patient (or legally acceptable representative) has been informed of all pertinent aspects of the trial prior to enrollment.
* Willingness and ability to comply with scheduled visits, treatment plans, laboratory tests, and other study procedures.

Exclusion Criteria:

* Presence of any condition inappropriate for HSCT.
* Life expectancy \< 3 months because of other severe diseases.
* Presence of any fatal disease, including respiratory failure, heart failure, liver or kidney function failure et al.
* Uncontrolled infection.
* Pregnancy or breastfeeding. 6．Has enrolled in anther clinical trials 7．Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or study drug administration, or may interfere with the interpretation of study results, and in the judgment of the investigator would make the patient inappropriate for entry into this study.