Multiple myeloma can be divided into the following eight types according to the increased type of abnormal immunoglobulin: IgG type, IgA type, IgD type, IgM type, IgE type, light chain type, dual clone type, and nonsecreted type, and two types according to the type of light chain: κ type, λ type [7]. The gene discussed is IGHE; the disease is plasma cell myeloma.