label: IgM Monoclonal Gammopathy of Undetermined Significance, Not Otherwise Specified
label_lc: igm monoclonal gammopathy of undetermined significance, not otherwise specified
description: "A subtype of IgM monoclonal gammopathy of undetermined significance that includes cases associated with MYD88 mutation and cases associated with the presence of monoclonal B-lymphocytes without the presence of abnormal lymphoplasmacytic aggregates that are diagnostic of lymphoplasmacytic lymphoma or other small B-lymphocytic neoplasms."