Table 1. Pertinent laboratory results.

Laboratory result	Value	Reference range
Serum creatinine	1.1	0.5 – 1.2 mg/dL
IgG4 level	177	2.4 – 121 mg/dL
IgE level	1309.7	1.5 – 165.3 IU/mL
ESR	77	< 30 mm/h
ANA	≥ 1 : 1,280	None
MPO-ANCA by ELISA	Positive	Negative
Anti-dsDNA antibody	Negative	Negative
C3	151	87 – 200 mg/dL
C4	53	18 – 52 mg/dL