Table 1: Laboratory workup.

Labs (reference normal range)Year 2011Year 2015 (Jan.)

WBC (4.8–10.8 k/μL)1.95.9

ANC (1.5–8 k/μL)0.64.6

B2 microglobulin (0.8–2.2 mg/L)1.3

Myeloperoxidase MPO (P-ANCA) (<1.0)<1<0.1

Proteinase PR3 (C-ANCA) (<1.0)181.2

C3 level (90–150 mg/dL)91

C4 level (16–47 mg/dL)<7

ESR (0–30 mm/hr)3460

CRP (≤5.5 mg/L)166

ANANegativeNegative

Neutrophil AbDetected