Table 1 Laboratory results on admission

Red blood cell (/HPF)

50–99

< 5

Urine protein/creatinine ratio (g/g)

0.32

< 0.15

Urine protein electrophoresis

Positive (κ & λ)

Negative

Leukocyte count (/μL)

7600

4500–9000

Hemoglobin (g/dL)

13.0

13.6–17.0

Platelet count (× 10⁴/μL)

32.1

14–36

Urea nitrogen (mg/dL)

14.9

8.0–22.0

Creatinine (mg/dL)

1.19

0.60–1.10

Uric acid (mg/dL)

6.8

3.6–7.0

Total protein (g/dL)

7.2

6.7–8.3

Albumin (g/dL)

4.1

4.0–5.0

Lactate dehydrogenase (IU/L)

162

119–229

Sodium (mEq/L)

140

138–146

Potassium (mEq/L)

4.8

3.6–4.9

Chloride (mEq/L)

104

99–109

Corrected serum calcium (mg/dL)

9.3

8.6–10.4

Phosphate (mg/dL)

3.2

2.5–4.7

C-reactive protein (mg/dL)

0.06

< 0.30

IgG (mg/dL)

1045

870–1700

IgA (mg/dL)

317

110–410

IgM (mg/dL)

444

33–190

IgE (IU/mL)

131.9

< 269

light-chain type κ (mg/L)

31.40

2.42–18.92

     type λ (mg/L)

33.60

4.44–26.18

Serum protein electrophoresis

Positive (κ & λ)

Negative

CH50 (CH50/mL)

41.5

25–48

C3 (mg/dL)

115

65–135

C4 (mg/dL)

35

13–35

IC (C1q) (μg/mL)

< 1.5

< 1.5

Cryoglobulin

Negative

Negative

Anti-nuclear antibody

< 80×

< 80×

Anti-ds DNA antibody (IU/mL)

2.5

< 10.0

PR3-ANCA (U/mL)

< 1.0

< 3.5

MPO-ANCA (U/mL)

< 1.0

< 3.5

Anti–GBM antibody (U/ml)

<7.0

<7.0

Tissue of bone marrow