Table 1. Autoimmune workup of the patient.

ANA: antinuclear antibody; Anti-U1 RNP: anti-U1 ribonucleoprotein; Anti-SSA 52 (Ro): anti-Sjogren's syndrome-related antigen A/anti-Ro; Anti-U3 RNP: anti-U3 ribonucleoprotein; Anti-GBM: anti-glomerular basement membrane; Anti-SCL-70: anti-topoisomerase I; Anti-dsDNA: anti-double-stranded DNA; ANCA: anti-neutrophil cytoplasmic antibody; IFA: immunofluorescence assay

Antibody	Result	Reference range
ANA titer	>1:640
ANA pattern	Speckled
Anti-U1 RNP	5	0-40 AU/mL
Anti-SSA 52 (Ro)	9	0-40 AU/mL
Anti-Jo 1	3	0-40 AU/mL
Anti-U3 RNP	Negative
Anti-GBM	0	0-19 AU/mL
Anti-SCL-70	8	0-40 AU/mL
Anti-dsDNA	Negative
ANCA IFA	<1:20