Table I.
Initial laboratory results from the time of diagnosis of systemic lupus erythematosus
| Laboratory test | Present case | Reference value/range |
|---|---|---|
| ANA | >1:640 | ≤1:40 |
| ESR | 89 mm/h | Women: 0-20 mm/h Men: 0-15 mm/h |
| CRP | 2.66 mg/dL | ≤0.8 mg/dL |
| CCP | 28 units | <20 units |
| Anti-dsDNA | 238 IU/mL (high–salt- positive) | 0-7 IU/mL |
| Antichromatin antibody | Positive | Negative |
| Anti-Smith antibody | Positive | Negative |
| Anti-RNP | Positive | Negative |
| Anti-Ro/SSA + SSB antibody | Positive | Negative |
| Antihistone antibody | Positive | Negative |
| Antiphospholipid antibody | Negative | Negative |
| Rheumatoid factor | Positive | Negative |
| C3 | 48 mg/dL | 100-233 mg/dL |
| C4 | 5 mg/dL | 14-48 mg/dL |
| Vitamin D | 13.4 ng/mL | 30-60 ng/mL |
| HCV | Negative | Negative |
| Platelets | 542,000/μL | 150,000-450,000/μL |
| Creatinine | 0.52 mg/dL | Women: 0.50-1.10 mg/dL Men: 0.70-1.30 mg/dL |
ANA, Antinuclear antibody; anti-dsDNA, anti–double-stranded DNA antibody; Anti-RNP, antinuclear ribonucleoprotein; CCP, anticyclic citrullinated peptide; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; HCV, hepatitis C virus.