Table 1 Results of  laboratory examinations on admission
Blood count | |
 WBC | 5800/μl |
 Neut | 56.7% |
 Eos | 3.6% |
 Bas | 1.0% |
 Mo | 4.9% |
 Ly | 33.8% |
 RBC | 430 × 104/μl |
 Hb | 13.0 g/dl |
 Plt | 28.4 × 104/μl |
Arterial blood gas (room air) | |
 pH | 7.427 |
 PaO2 | 94.5 Torr |
 PaCO2 | 36.8 Torr |
 HCO3- | 23.7 mEq/l |
 BE | −0.3 mEq/l |
Blood chemistry | |
 TP | 8.2 g/dl |
 Alb | 5.0 g/dl |
 T-bil | 0.3 mg/dl |
 AST | 16 IU/l |
 ALT | 16 IU/l |
 LDH | 178 IU/l |
 ALP | 242 IU/l |
 γGTP | 16 IU/l |
 BUN | 17.8 mg/dl |
 Cre | 0.6 mg/dl |
 Na | 143 mEq/l |
 K | 4.0 mEq/l |
 Cl | 108 mEq/l |
 Ca | 9.9 mg/dl |
Serum | |
 CRP | 0.02 mg/dl |
 IgG | 1952 mg/dl |
 IgA | 309 mg/dl |
 IgM | 95 mg/dl |
 IgG4 | 25 mg/dl |
 CEA | 1.96 ng/ml |
 CA19-9 | 2.0 U/ml |
 ANA | x 40 |
 Anti CCP antibody | <  0.6 U/ml |
 anti SS-Aantibody | negative |
 Anti SS-B antibody | negative |
 Serum amyloid A | 2.9 μg/ml |
 s-IL-2R | 412 IU/ml |
 β-D glucan | <  5.0 pg/ml |
 Cryptococcus antigen | negative |
 Aspergillus antigen | negative |
 Candida antigen | negative |
 T-SPOT | negative |
Serum protein electrophoresis | |
 M protein | negative |
Urine protein electrophoresis | |
 Bence-Jones protein | negative |