- Determine the 2-year progression-free survival (PFS) rate after treatment with rituximab, ifosfamide, carboplatin, and etoposide (R-ICE) in patients with bulky stage II or stage III or IV diffuse large B-cell non-Hodgkin's lymphoma who remain positron emission tomography (PET)-positive after 3 courses of rituximab, cyclophosphamide, vincristine, doxorubicin hydrochloride, and prednisone.