Table 1: Laboratory findings on admission.

Peripheral blood
 WBC9800/μL
 Neutro78.1%
 RBC311 × 104/μL
 Hb10.2 g/dL
 Ht31.0%
 PLT26.3 × 104/μL
Blood chemistry
 AST17 IU/L
 ALT12 IU/L
 LDH286 IU/L
 ALP209 IU/L
 TP6.6 g/dL
 Alb2.7 g/dL
 BUN43 mg/dL
 Cr3.22 mg/dL
 Na144 mEq/L
 K4.3 mEq/L
 Cl111 mEq/L
 Ca8.0 mg/dL
 Pi4.0 mg/dL
 TC183 mg/dL
 LDL-C116 mg/dL
 TG121 mg/dL
 FPG83 mg/dL
 HbA1c5.5%
Serology
 CRP5.9 mg/dL
 IgG962 mg/dL
 IgA149 mg/dL
 IgM40 mg/dL
 C388 mg/dL
 C419 mg/dL
 CH5030.5 U/mL
 TSH2.42 μIU/mL
 BNP1135.7 pg/mL
 KL-6689 U/mL
 ANA×80 (speckled)
 dsDNAIgG<5.0 IU/mL
 RA test(−)
 MPO-ANCA<10 E.U.
 PR3-ANCA<10 E.U.
 Azurocidin-ANCA(−)
 BPI-ANCA(+)
 Cathepsin G-ANCA(−)
 Elastase-ANCA(+)
 Lactoferrin-ANCA(−)
 Lysozyme-ANCA(+)
 SS-A/RO(−)
 SS-B/LA(−)
 Anti-GBM<10 E.U.
 Cryoglobulin(−)
 HBs-Ag(−)
 HCV-Ab(−)
 TPHA(−)
Urine
 U-protein5.13 g/day
 24-hour-CCr21 mL/min
Sediment
 RBCMany/HPF
 WBC50–99/HPF
 C-granule2+
 C-RBC1+