PlasmacytomaMultiple MyelomaSkull NeoplasmsBone NeoplasmsMyeloma ProteinsMagnetic Resonance ImagingBoronic AcidsPyrazinesSolitary NucleusPlasma CellsThalidomideParaproteinemiasMonoclonal Gammopathy of Undetermined SignificanceMelphalanLeukemia, Plasma CellParaproteinsNeoplasms, Plasma CellDexamethasoneSolitary Pulmonary NoduleSyndecan-1Immunoglobulin Light ChainsImmunoglobulin kappa-ChainsBence Jones ProteinBone MarrowTransplantation, AutologousImmunoglobulin lambda-Chains