A plasma cell myeloma lacking clinical manifestations and organ impairment. The disease is smoldering plasma cell myeloma (Monarch Disease Ontology term MONDO_0005235). Also known as: asymptomatic myeloma, asymptomatic plasma cell myeloma, smoldering Multiple myeloma/plasma cell myeloma, smoldering multiple myeloma, smoldering myeloma, smouldering Multiple myeloma/plasma cell myeloma, smouldering multiple myeloma, smouldering myeloma.