Systemic Lupus Erythematosus Presented with Bilateral Orbital Edema and Negative Serology

Table 2

Immunochemistry.

ANA CTD screen	Negative	Anti-RNP70	Negative
Anti-CCP IgG	Negative	Anti-Jo1	Negative
Antirheumatoid factor IgA	Negative	Anti-Scl-70	Negative
Antirheumatoid factor IgM	1.1	Antismith	Negative
Rheumatoid factor quantitative	9.12 iu/ml (<20)	Anti-SS-A/RO, Anti-SSB/LA	Negative
Anticardiolipin IgG, IgM, and IgA	Negative	Anti-U1RNP	Negative
Lupus anticoagulant	Negative	C3	1.5 (normal range?)
Anticentromere protein B	Negative	C4	0.364 (normal range?)
Anti-ds DNA	Negative	Vitamin D	11.5 ng/ml
ACE	Normal range

ANA: antineutrophil antibody; CTD screen: connective tissue disease screen; anti-ds DNA: anti-double-stranded DNA; ACE: angiotensin-converting enzyme; anti-RNP70 antibody: anti-ribonucleoprotein antibody; anti-Jo1 antibody: myositis-specific autoantibodies directed against the histidyl-tRNA synthetase; anti-Scl-70: anti-topoisomerase antibody; anti-SSA/Ro autoantibodies: anti-Sjögren's-syndrome-related antigen A; anti-U1RNP: anti-ribonucleoprotein.