Which of the following substances has abnormal values early in the course of multiple myeloma (MM)?

Immunoglobulins

MM is characterized by malignant plasma cells that produce an increased amount of immunoglobulin that isnt functional. As more malignant plasma cells are produced. theres less space in the bone marrow for RBC production. In late stages. platelets and WBCs are reduced as the bone marrow is infiltrated by malignant plasma cells.