Pathology 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 💡 Explanation Beta-2 microglobulin is used as a tumor marker for which of the following diseases? ✓ Correct Answer: A. Multiple myeloma