My mom has plasmacytoma in the right and left upper tibia. could it be multiple myaloma?

Plasmacytoma: Having 2 plasmacytomas in long bones is considered as one of the major criteria for myeloma. She needs complete staging workup which might have been done already and should include cbc, chemistry panel, immunoglobulin levels. Spep, ife. 24 hour urine for protein, serum light chain assay, beta 2 micro globulin and a bone marrow biopsy aspirate and biopsy with cytogenetic a and fish panel.