Dose Augmented Rituximab and ICE for Pts With Primary Refractory and Poor Risk Relapsed Aggressive B-Cell NHL

"ANC must be ≥1000/µl and platelet count must be ≥50,000/µl. Rituximab will be administered at a dose of 375 mg/m2 IV on days 1 and 3 of the each cycle. Premedication will be given.ICE will be administered as follows: Day 3: Etoposide 200 mg/m2 IV q12 hrs x 3. Day 4: Ifosfamide 10 g/m2 and MESNA 10 g/m2 mixed and infused together as a continuous infusion over 48 hours. Day 5: Carboplatin IV dosed by the Calvert formula using an AUC of 5.~Carboplatin dose (mg) = 5 x (Clcr + 25) For the first ten patients enrolled, G CSF will be administered beginning on day seven of each cycle and G CSF will continue until stem cell collection is completed. The dose will be 960 ug or 10 ug/kg if weight is greater than 100 kg.~For the remaining patients, G-CSF will be administered for 10 days beginning on day 7 for cycle 1. The dose will be 300-480 ug/d. For cycle 2 the dose will be 960 ug or 10ug/kg if weight is \> 100kg. Leukapheresis will continue."