Immunochemotherapy with rituximab and cyclophosphamide, doxorubicin, vincristine, and prednisone significantly improves response and time to treatment failure, but not long-term outcome in patients with previously untreated mantle cell lymphoma: results of a prospective randomized trial of the German Low Grade Lymphoma Study Group (GLSG).

PURPOSE: Mantle cell lymphoma (MCL) is characterized by a poor prognosis with a low to moderate sensitivity to chemotherapy and a median survival of only 3 to 4 years. In an attempt to improve outcome, the German Low Grade Lymphoma Study Group (GLSG) initiated a randomized trial comparing the combination of cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) and rituximab (R-CHOP) with CHOP alone as first-line therapy for advanced-stage MCL. PATIENTS AND METHODS: One hundred twenty-two previously untreated patients with advanced-stage MCL were randomly assigned to six cycles of CHOP (n = 60) or R-CHOP (n = 62). Patients up to 65 years of age achieving a partial or complete remission underwent a second randomization to either myeloablative radiochemotherapy followed by autologous stem-cell transplantation or interferon alfa maintenance (IFNalpha). All patients older than 65 years received IFNalpha maintenance. RESULTS: R-CHOP was significantly superior to CHOP in terms of overall response rate (94% v 75%; P = .0054), complete remission rate (34% v 7%; P = .00024), and time to treatment failure (TTF; median, 21 v 14 months; P = .0131). No differences were observed for progression-free survival. Toxicity was acceptable, with no major differences between the two therapeutic groups. CONCLUSION: The combined immunochemotherapy with R-CHOP resulted in a significantly higher response rate and a prolongation of the TTF as compared with chemotherapy alone. Hence, R-CHOP may serve as a new baseline regimen for advanced stage MCL, but needs to be further improved by novel strategies in remission.

Early consolidation by myeloablative radiochemotherapy followed by autologous stem cell transplantation in first remission significantly prolongs progression-free survival in mantle-cell lymphoma: results of a prospective randomized trial of the European MCL Network.

Mantle-cell lymphoma (MCL) is characterized by poor prognosis with a median survival of only 3 to 4 years. To improve clinical outcome, the European MCL Network initiated a randomized trial comparing consolidation with myeloablative radiochemotherapy followed by autologous stem cell transplantation (ASCT) to alpha-interferon maintenance (IFN alpha) in first remission. Patients 65 years of age or younger with advanced-stage MCL were assigned to ASCT or IFN alpha after achievement of complete or partial remission by a cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP)-like induction therapy. According to the International Prognostic Index (IPI), 43% of patients had a low-risk, 41% a low-intermediate, 11% a high-intermediate, and 6% a high-risk profile. Sixty-two of 122 patients proceeded to ASCT and 60 received IFN alpha. Patients in the ASCT arm experienced a significantly longer progression-free survival (PFS) with a median of 39 months compared with 17 months for patients in the IFN alpha arm (P = .0108). The 3-year overall survival (OS) was 83% after ASCT versus 77% in the IFN group (P = .18). Early consolidation by myeloablative radiochemotherapy followed by ASCT is feasible and results in a significant prolongation of PFS in advanced-stage MCL. Longer follow-up is needed to determine the effect on OS.