Table 1 Laboratory findings on admission

 WBC (/uL)

10,800

 RBC (/uL)

3.75 × 10⁶

 Hb (g/dL)

9.9

 MCV (fL)

81.9

 PLT (/uL)

29.7 × 10⁴

 TP (g/dL)

6.1

 Alb (g/dL)

3.4

 AST (IU/L)

21

 ALT (IU/L)

16

 LDH (IU/L)

423

 BUN (mg/dL)

21.2

 Cr (mg/dL)

3.18

 eGFR (ml/min/1.73m²)

18.5

 CRP (mg/dL)

10.75

 IgA (mg/dL)

139

 IgG (mg/dL)

649

 IgM (mg/dL)

44

 C3 (mg/dL)

92

 C4 (mg/dL)

27

 RF (IU/ml)

< 3

 ANA

< 40

 MPO-ANCA(U/ml)

< 1.0

 PR3-ANCA (U/ml)

< 3.5

 ASO (IU/ml)

51

 Blood culture

(−)

 Urine culture

(−)

 occult blood

(−)

 Protein

(+)

 Glucose

(−)

 WBC

1–4/HPF

 RBC

< 1/HPF

 granular cast

(+)

 waxy cast

(+)

 protein quantity (g/gCr)

0.26

 NAG (U/L)

12

 α1-MG (mg/dL)

66.2

 β₂-MG (mg/dL)

37,720