Bortezomib, Liposomal Doxorubicin Hydrochloride, Dexamethasone, and Cyclophosphamide in Treating Patients With Multiple Myeloma That Relapsed After Autologous Stem Cell Transplant

This phase II trial is studying how well giving bortezomib together with liposomal doxorubicin hydrochloride, dexamethasone, and cyclophosphamide works in treating patients with multiple myeloma that relapsed after autologous stem cell transplant. Bortezomib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Drugs used in chemotherapy, such as liposomal doxorubicin hydrochloride, dexamethasone, and cyclophosphamide, work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Giving bortezomib together with liposomal doxorubicin hydrochloride, dexamethasone, and cyclophosphamide may kill more cancer cells.