Pathology Which of the following is not a minor diagnostic criteria for multiple myeloma? A Lytic bone lesions B Plasmacytosis greater than 20% C Plasmacytoma on biopsy D Monoclonal globulin spike on serum electrophoresis of > 2.5 g/dl for IgG, >1.5 g/dl for IgA 💡 Explanation Which of the following is not a minor diagnostic criteria for multiple myeloma? ✓ Correct Answer: C. Plasmacytoma on biopsy