This phase III trial studies how well lenalidomide and dexamethasone works with or without daratumumab in treating patients with high-risk smoldering myeloma. Drugs used in chemotherapy, such as lenalidomide and dexamethasone, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Immunotherapy with monoclonal antibodies, such as daratumumab, may induce changes in the body's immune system and may interfere with the ability of tumor cells to grow and spread. Giving lenalidomide and dexamethasone with daratumumab may work better in treating patients with smoldering myeloma.

This phase III trial compares the combination of four drugs (daratumumab, bortezomib, lenalidomide and dexamethasone) to the use of a three drug combination (daratumumab, lenalidomide and dexamethasone). Bortezomib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Chemotherapy drugs, such as lenalidomide, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Daratumumab is a monoclonal antibody that may interfere with the ability of cancer cells to grow and spread. Anti-inflammatory drugs, such as dexamethasone lower the body's immune response and are used with other drugs in the treatment of some types of cancer. Adding bortezomib to daratumumab, lenalidomide, and dexamethasone may be more effective in shrinking the cancer or preventing it from returning, compared to continuing on daratumumab, lenalidomide, and dexamethasone.

This phase III trial compares the effect of usual treatment (lenalidomide) to using daratumumab / rHuPH20 plus the usual treatment after stem cell transplantation. This drug combination may help patients live longer after their stem cell transplant. Another purpose of this study is to learn if the presence and amount of minimal residual disease (MRD) can help doctors predict when a patient’s multiple myeloma will get worse. MRD is the name for the small number of cancer cells that remain in the patient even after their multiple myeloma has been treated and they have no symptoms of the disease. Drugs used in chemotherapy, such as lenalidomide, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Immunotherapy with daratumumab / rHuPH20, may induce changes in body’s immune system and may interfere with the ability of tumor cells to grow and spread. Giving lenalidomide and daratumumab / rHuPH20 may work better in treating patients with multiple myeloma compared to lenalidomide alone.

This phase III trial compares three-drug induction regimens followed by double-or single-drug maintenance therapy for the treatment of newly diagnosed multiple myeloma in patients who are not receiving a stem cell transplant and are considered frail or intermediate-fit based on age, comorbidities, and functional status. Treatment for multiple myeloma includes initial treatment (induction) which is the first treatment a patient receives for cancer followed by ongoing treatment (maintenance) which is given after initial treatment to help keep the cancer from coming back. There are three combinations of four different drugs being studied. Bortezomib is one of the drugs that may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Lenalidomide works by helping bone marrow to produce normal blood cells and killing cancer cells. Anti-inflammatory drugs, such as dexamethasone, lower the body's immune response and are used with other drugs in the treatment of some types of cancer. Daratumumab and hyaluronidase-fihj is a monoclonal antibody that may interfere with the ability of cancer cells to grow and spread. Patients receive 1 of 3 combinations of these drugs for treatment to determine which combination of study drugs works better to shrink and control multiple myeloma.