Multi-organ IgG4-related disease continues to mislead clinicians: A case report and literature review

Table 1 Immunological tests

Immunological tests	Value	Normal range
β-2 Glycoprotein-1 antibodies Ig G, A, M (o.d.)	0.512 (positive)	0.497
Cardiolipin antibodies Ig G, A, M (o.d.)	0.588 (positive)	0.552
Antinuclear antibodies	> 1:200 (positive) Dense fine speckled	< 1:40
Anti-neutrophil cytoplasmic antibodies	< 1:10 (negative)	< 1:10
Rheumatoid factor	< 20.0	< 30 U/mL
Complement C4	0.15	0.15–0.57 g/L
Complement C3c	1.09	0.9–1.8 g/L
ENA: nRNP/Sm	Negative	Negative
ENA: Sm	Negative	Negative
ENA: SS-A	Negative	Negative
ENA: SS-B	Negative	Negative
ENA: Ro-52	Negative	Negative
ENA: Scl-70	Negative	Negative
ENA: PM-Scl	Negative	Negative
ENA: Jo-1	Negative	Negative
ENA: CENP-B	Negative	Negative
ENA: PCNA	Negative	Negative
ENA: dsDNA	Negative	Negative
ENA: Nucleosome	Negative	Negative
ENA: Histones	Negative	Negative
ENA: Ribosomal P-protein	Negative	Negative
ENA: AMA-M2	Negative	Negative

o.d.: Optical density; ENA: Extractable nuclear antigens; SS: Sjögren's syndrome.