This post authorization safety study is designed as prospective non interventional study for patients with newly diagnosed multiple myeloma who are not eligible for transplant. The objective is to compare the incidence of cardiovascular events between patients treated with a first-line lenalidomide containing regimen and those treated with a first-line non-lenalidomide containing regimen. Treatment in both cohorts will be done according to standard care. The study will gather risk factor information at baseline and throughout follow-up. Any cardiovascular event occurring will be assessed by an independent committee. Other safety endpoints will be collected through standard procedures. Observation period will be 3 years on treatment, with an additional evaluation of cardiovascular events 6 months' post treatment and a follow up period until 5 years after inclusion. During follow up the incidence of second primary malignancies (SPM) and overall survival will be assessed.

Inclusion Criteria:

1. Must have understood and voluntarily signed the Informed Consent Form (ICF)
2. Age ≥ 18 years at the time of signing the ICF
3. Newly diagnosed with multiple myeloma
4. Must not be eligible for transplant
5. Will be treated with a first-line lenalidomide-containing or nonlenalidomide-containing regimen, or currently is being treated with a first-line regimen and has received less than 2 cycles.

Exclusion Criteria:

1. Prior treatment for Monoclonal gammopathy of undetermined significance (MGUS) or smoldering myeloma with lenalidomide, thalidomide, or pomalidomide or any agent considered to be a first-line Multiple myeloma (MM) therapy.
2. Prior treatment with lenalidomide, thalidomide, or pomalidomide or any agent considered to be a first-line MM therapy through clinical trial participation or patient access program
3. Two or more complete cycles of first-line therapy or any agent considered to be a firstline MM therapy for newly diagnosed multiple myeloma (NDMM) treatment before study enrollment
4. Refusal to participate in the Revlimid Transplant noneligible (TNE) Newly diagnosed multiple myeloma (NDMM) Post-authorization safety study (PASS) or current participation in the treatment phase of an interventional clinical trial.

Patients with newly diagnosed multiple myeloma (NDMM) who are not eligible for transplant (TNE) starting their first treatment for multiple myeloma. Patients receiving any first line regimen can be included into the study. Decision for treatment needs to be done before inclusion into the trial.