Maintenance Therapy Post-HSCT in High-risk Aggressive Lymphoma

Inclusion Criteria: * Age 14-70 years * High-risk aggressive lymphoma underwent auto-HSCT * Presence of 2 or more signs of unfavorable prognosis (IPI 2-4) * Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1, or 2 * Adequate hematological function * Offer informed consent Exclusion Criteria: * Concomitant other cancer * Congestive heart failure, unstable angina, severe cardiac arrhythmias and conduction disturbances, myocardial infarction * Renal insufficiency (serum creatinine greater than 0.2 mmol/L) (except cases with specific kidney infiltration, urinary tract compression by tumor conglomerate or presence of uric acid nephropathy due to massive cytolysis syndrome) * Liver failure (except cases with liver tumor infiltration), acute hepatitis or active phase of chronic hepatitis B or C with serum bilirubin greater than 1.5 standards, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) greater than 3 standards, prothrombin index less than 70% * Severe pneumonia (except cases with specific lungs infiltration), accompanied by respiratory failure (dyspnea \> 30 in min., hypoxemia less than 70 mm Hg, when it is impossible to compensate situation in 2-3 days) * Severe mental disorders (delusions, severe depressive syndrome and other manifestations of productive symptoms) not related with specific infiltration of central nervous system * Pregnancy