Other laboratory findings
| HBs antigen | Negative |
|---|---|
| Anti-HBs antibody | Negative |
| Anti-HCV antibody | Negative |
| Anti-HIV antibody | Negative |
| Syphilis RPR/TP | Negative |
| Chlamydia trachomatis urine PCR | Negative |
| Gonococcal urine PCR | Negative |
| Mycobacterium tuberculosis IGRA | Negative |
| Chlamydia pneumoniae IgM | Negative |
| Mycoplasma IgM | Negative |
| C3 (mg/dL, 73–138) | 136 |
| C4 (mg/d, 11–31) | 43 |
| Antinuclear antibody | Negative |
| Rheumatoid factor | Negative |
| Anti-cyclic citrullinated peptide antibodies | Negative |
| HLA-B27 | Negative |
HBs, hepatitis B surface; HCV, hepatitis C virus; HIV, human immunodeficiency virus; RPR, rapid plasma reagin; TP, treponema pallidum.