Summary:We have undertaken a retrospective sequential-cohort analysis of 131 lymphoma patients treated with the BEAM regimen and autologous stem cell transplantation, to compare BEAM at standard doses (sBEAM; n ¼ 67 from May 1990 to April 1995) and BEAM with escalated etoposide dose from 800 to 1600 mg/m 2 (eBEAM; n ¼ 64 from May 1995 to June 1999). Transplant-related mortality and incidence of secondary malignancies were similar in both groups. Disease progression was significantly lower in indolent lymphoma (IL) patients receiving eBEAM (7 vs 43%), although survival was comparable due to a higher toxic mortality in the eBEAM group. The 5-year event-free survival and overall survival were better in Hodgkin's disease (HD) patients treated with eBEAM (70 and 77%, respectively) compared to sBEAM (58 and 69%, respectively), but the difference was not statistically significant. In aggressive lymphomas, no difference was detected between groups. Our results indicate that while escalation of the etoposide doses in the BEAM conditioning regimen does not appear to improve outcome, encouraging results in IL and HD may warrant further studies. High-dose chemotherapy supported by autologous stemcell transplantation (ASCT) is widely used for relapsing or resistant non-Hodgkin's lymphoma (NHL) or Hodgkin's disease (HD) patients, and may be a promising procedure for initial therapy of aggressive NHL with poor prognostic features. 1 Under 35% of HD and under 20% of aggressive NHL patients achieve long-term disease-free survival (DFS) with conventional chemotherapy. 2-4 ASCT results in DFS of 30-65% in primary refractory or relapsed HD 5-10 and 30-50% in aggressive NHL. [11][12][13][14][15][16] Randomized studies have demonstrated the superiority of ASCT to standard salvage chemotherapy for patients with resistant or relapsed HD, 2,3 relapsed aggressive lymphoma 4 or relapsed follicular lymphoma. 17 These results suggest a correlation between dose intensity and disease control. Thus, it is possible that further doseintensification of the conditioning regimen may improve outcome of patients undergoing ASCT. Escalation of the BCNU dose in BEAM and CBV regimens has resulted in increased mortality due to interstitial pneumonitis. 18,19 Escalation of the melphalan dose resulted in increased mucositis and haemorrhagic cystitis. 20 Mills et al 21 escalated the dose of etoposide in the BEAM protocol from 800 to 1600 mg/m 2 over 4 days, and then to 2400 mg/m 2 over 4 days. The maximum tolerable dose was 1600 mg/m 2 over 4 days, but no conclusions could be drawn regarding the impact of the escalated etoposide dose on tumour response and DFS. We have confirmed 22 that increasing the etoposide dose from 800 to 1600 mg/m 2 in BEAM regimen is not associated with greater early toxicity.We have now analysed the impact of the etoposide dose in 131 lymphoma patients in terms of early and late toxicities, response and survival.
Patients and methods
PatientsA total of 131 consecutive lymphoma patients treated at a single institution with the BEAM ...