Pathology Misc. (W.B.C) 0256ca27 Beta-2 -microglobulin is a tumor marker for A Multiple myeloma B Lung cancer C Colonic neoplasm D Choriocarcinoma High-Yield Explanation Ans. (a) Multiple myeloma(Ref: Robbins 9th/pg598-602)Serum b2 microglobulin level <3.5mg/L indicates good prognosis, in multiple myeloma.