Table 2.

Patient demographics

Sex (no.)
Male	25 (59.5%)
Female	17 (40.5%)
Median age	59.5 yrs. (38–81)
Imaging pattern on WB-MRI (no.)
Focal	25 (59.5%)
Diffuse	5 (11.9%)
Focal and diffuse	5 (11.9%)
Salt and pepper	7 (16.7%)
Heavy chain (no.)
IgA	4 (9.5%)
IgD	3 (7.1%)
IgG	19 (45.2%)
Light chain only	16 (38.1%)
Light chain (no.)
Kappa	22 (52.4%)
Lambda	20 (47.6%)
International staging system (no.)
Stage I	7 (16.7%)
Stage II	20 (47.6%)
Stage III	15 (35.7%)
Laboratory findings
Bone marrow plasma cell (%)	39.7 ± 29.7
Serum M-protein (g/dL)	2.1 ± 2.6
Urine M-protein (mg/dL)	827.9 ± 2549.0
Serum FLC ratio†	458.9 ± 736.0
Absolute FLC difference (mg/L)	3880.7 ± 5612.6
Beta-2 microglobulin (ug/mL)	7.3 ± 8.8
Albumin (g/dL)	3.3 ± 0.7
Calcium (mg/dL)	9.3 ± 1.6
Creatinine (mg/dL)	1.7 ± 1.6
Hemoglobin (g/dL)	10.3 ± 2.1