Consolidation and maintenance therapy in multiple myeloma: randomized comparison of a new approach to therapy after initial response to treatment.

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Abstract
A randomized, controlled trial was initiated in 1977 to evaluate the impact of three alternative approaches to consolidation and maintenance therapy after initial maximal response for multiple myeloma. All patients were treated initially with BCNU, cyclophosphamide, and prednisone (BCP) until a designated level of response was achieved. Responders were randomly assigned to either melphalan and prednisone (MP); prednisone, Adriamycin (Adria Laboratories, Columbus, Ohio), azathioprine, and vincristine (PAIV), or no therapy until relapse, then treatment with BCP. Initial response rates were comparable with previous trials. A small number of incremental responses were observed with both MP and PAIV. Survival was the same for all three maintenance approaches and the same as that observed in our previous continuous BCP or MP therapy. Additional or consolidation/maintenance therapy of the type administered here appears to offer little advantage once an initial response has been achieved.