*A 61-year-old male radiologist has back pain that is rated at 9/10. He also complains of fatigue and has noticed some unexplained weight loss. On examination there is a mild fever. Blood tests show a normochromic normocytic anemia.*

*Which additional laboratory results might also be present?*

A. Increased ESR

B. Bence Jones Proteins

C. Positive HLA B27

D. Decreased phosphorous

E. Decreased ESR

F. Decreased Calcitonin

G. Positive Rheumatoid Factor

H. Hypocalcemia

I. Increased serum protein