<prompt> Which of the following is not a minor diagnostic criteria for multiple myeloma?Lytic bone lesionsPlasmacytosis greater than 20Plasmacytoma on biopsyMonoclonal globulin spike on serum electrophoresis of 2.5 gdl for IgG, 1.5 gdl for IgA  <response>: Ans. c Plasmacytoma on biopsyRef: Wintrobes 12thpg2377Durie and Salmon criteria for diagnosis of Multiple myeloma.A minimum of 1 major and 1 minor criterion needed, although 1 a is not sufficient, or 3 minor criteria that must include a and b.However, International myeloma working group 2011 has revised the criteria as mentioned in pretexts. 