Autologous Stem Cell Transplant Followed By Maintenance Therapy in Treating Elderly Patients With Multiple Myeloma

Inclusion Criteria: * Participants must have had a diagnosis of symptomatic multiple myeloma (MM), MM + amyloidosis, or POEMS (osteosclerotic myeloma: polyneuropathy, organomegaly, endocrinopathy, monoclonal protein, skin changes) requiring treatment; participants with a previous history of smoldering myeloma will be eligible if there is evidence of progressive disease requiring chemotherapy; Note that study participants do not need to have active disease at the time of study entry, as participants may have received up to 12 months of prior chemotherapy, which might have induced a response * Protein criteria must be present at diagnosis (quantifiable M-component of IgG, IgA, IgD, or IgE and/or urinary kappa or lambda light chain, Bence-Jones protein, or Free Kappa Light Chain or Free Lambda Light Chain) in order to evaluate response. Non-secretory participants are eligible provided the participant has \> 20% plasmacytosis OR multiple (≥3) plasmacytomas or lesions on MRI at the time of diagnosis or study enrollment , OR the presence of lesions on PET/CT scan or skeletal survey at diagnosis or study enrollment. * Participants must have received ≤12 months of prior chemotherapy for this disease without evidence of progressive disease with treatment. Participants may have received prior radiotherapy provided approval has been obtained from the PI. Participants with a history of radiation who have a platelet count \<150,000 due to radiation (disease, chemo, and other factors have…