A Real-world Study in Participants With Smoldering Multiple Myeloma

Inclusion Criteria: * Have a documented diagnosis of smoldering multiple myeloma (SMM). SMM is defined as: (a) Clonal bone marrow plasma cells (BMPCs) greater than or equal to (\>=) 10 percent (%) and/or serum M-protein \>= 3 grams per deciliter (g/dL) and/or urine M-protein \>= 500 milligram per 24 hours (mg/24hrs). (b) Absence of SLiM-CRAB criteria: \>= 60 % clonal BMPCs, involved/uninvolved free light chain (FLC) ratio \>= 100 and involved FLC \>= 10 and magnetic resonance imaging (MRI) lesions; calcium elevation, renal insufficiency, anemia, and bone lesions (AB) criteria * Informed consent obtained prior to retrospective data collection in accordance with local requirements, either an informed consent form (ICF) indicating that the participants signed a consent for data collection for this research and agrees to have their data collected and analyzed, with source data verification (SDV), or the country does accept the ICF waiver for such type of studies * Data recorded in participants' medical charts from date of SMM diagnosis and at least 2 years after should be available in the participant's medical chart at the participating site. However, participants who died within the 2 years from SMM diagnosis are eligible Exclusion Criteria: * Therapy for multiple myeloma (MM) initiated within 90 days of SMM diagnosis * Date of SMM diagnosis is missing * Participants who have participated/are participating in any SMM interventional (either active treatment or control arm) stu…