<prompt> All of the following are minor criteria for multiple myeloma except -Plasmacytosis 20Multiple lytic lesionIgA 100 mgdl and IgG 600 mgdlPlasmacytoma on tissue biopsy  <response>: Final Diagnosis -- Nonsecretory multiple myeloma. Diagnostic requirements: The diagnosis of multiple myeloma requires a minimum of one major criterion and one minor criterion, or three minor criteria which must include bone marrow plasmacytosis of 10-30 percent and the presence of a monoclonal protein. Ref Davidson 23rd edition pg 789 