“…(1) simplicity of implementation, (2) allowing autologous HSCT to be performed entirely as outpatient, (3) reduction of transplantation costs, (4) reducing the time between the last induction therapy and high-dose chemotherapy, (5) prevention of DMSO toxicity, (6) expansion of the number of medical institutions performing stem cell therapies, (7) no significant loss of viability of the collected HSCs provided stem cell infusion is made within 5 days of apheresis, and (8) potent engraftment syndrome and autologous graft versus host disease (GVHD) [33][34][35][36][37][38]. HSCT without cryopreservation has the following disadvantages: (1) limitation of the use of standard high dose schedules such as BEAM (BCNU, etoposide, cytarabine and melphalan) employed in autologous HSCT for lymphoma, (2) plenty of coordination needed between various teams regarding timing of: stem cell mobilization, apheresis, administration of conditioning therapy, and infusion of stem cells, and (3) inability to store part of the collection and reserving it for a second autologous HSCT in case a rich product is obtained [33][34][35][36][37][38] Outpatient HSCT MM is the leading indication for autologous HSCT worldwide. Patients with MM are ideal candidates for outpatient autologous HSCT because of the following reasons: the ease of administering high-dose melphalan, the relatively low extra-hematological toxicity and the short period of neutropenia [39].…”