Beta-2 microglobulin is used as a tumor marker for which of the following diseases?: (A) Multiple myeloma, (B) Acute lymphoblastic leukemia, (C) Hairy cell leukemia, (D) Lymphoplasmacytic lymphoma
Answer is A. Tumor marker for multiple myeloma is Serum beta-2 microglobulin Serum beta-2 microglobulin level <3.5mg/L indicates better prognosis