Abbreviations: ASCT, autologous stem cell transplantation; RCHOP, rituximab+cyclophosphamide+adriamycin+vincristine+prednisolone; CR, complete remission; PR, partial remission; RT, radiation therapy; SCT, stem cell transplantation; FDG, ¹⁸F-fluoro-2-deoxy-D-glucose; PET, positron emission tomography; CT, computed tomography; G-CSF, granulocyte colony-stimulating factor; BU, busulfan; CY, cyclophosphamide; VP-16, etoposide; MEL, melphalan; Mito, mitoxantrone; ARAC, cytosine arabinoside; BCNU, carmustine; Ifos, ifosfamide; Carb, carboplatine; CD, cluster of differentiation; ANC, absolute neutrophil count; PLT, platelet.