Multiple Myeloma Mimicking a Small Vessel Vasculitis Presentation

Table 1

Test results of the approach.

Test performed	Test result	Normal range
Rheumatoid factor	8.6 UI/mL	0–12 UI/mL
Complement C3 levels	127 mg/dL	88–165 mg/dL
Complement C4 levels	34 mg/dL	14–44 mg/dL
Antinuclear antibodies	Negative	Negative
Anti-DNA antibodies	Negative	Negative
Extractable nuclear antigens: Ro, La, Sm, and RNP	0.2, 0.1, 0.1, and 0, respectively	0–0.9
C-ANCA	Negative	Negative
P-ANCA	Negative	Negative
HIV serology	Nonreactive	Nonreactive
Hepatitis B and C serology	Nonreactive	Nonreactive
Rapid plasma reagin	Nonreactive	Nonreactive
24-hour urine test	Creatinine clearance 42 mg/24 h	0.04–0.24 gr/24 h
	Proteins in urine 12 gr/24 h
Albumin	4.2 gr/dL	3.5–5 gr/dL
Antiphospholipid antibodies: Anticardiolipin IgG and IgM, lupus anticoagulant, β2GP, IgG, and IgM	Negative	Negative
Cryoglobulins	Negative	Negative
Transthoracic echocardiography	There were no vegetations, cardiac tumor or other sources of emboli. Left ventricular ejection fraction 65%	—
Renal ultrasonography	No abnormalities	—
Thoracic X-ray	Normal	—