A female client is undergoing tests for multiple myeloma. Diagnostic study findings in multiple myeloma include:
A. A decreased serum creatinine level
B. A low serum protein level
C. Hypocalcemia
D. Bence Jones protein in the urine
Correct Answer: D. Bence Jones protein in the urine
Option D: Bence-Jones protein is an antibody fragment called a light chain that is not detectable in the urine. A presence of Bence Jones may indicate excess light chain production of a single type of antibody by the bone marrow cells.
Option A: The serum creatinine level may also be increased.
Option B: Serum protein electrophoresis shows elevated globulin spike.
Option C: Serum calcium levels are elevated because calcium is lost from the bone and reabsorbed in the serum.