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Table 2 Autoimmune workup

From: Delay in diagnosing a patient with mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) syndrome who presented with status epilepticus and lactic acidosis: a case report

Test

Result

Reference range

RF

20 IU/mL

0–20 IU/mL

C3

1.05 g/L

0.79–1.52 g/L

C4

0.30 g/L

0.16–0.38 g/L

Anti-thyroid peroxidase Ab

1004.5 IU/mL

0–75 IU/mL

Anti-ds DNA Ab (CLIA)

< 9.8 IU/mL

0–35 IU/mL

Anti-ds DNA Ab

Negative

Negative/Positive

Anti-CCP Ab

Negative

Negative/Positive

ANA

Negative

Negative/Positive

Anti-RNP/Sm

Negative

Negative/Positive

Anti-Sm

Negative

Negative/Positive

Anti-SS-A

Negative

Negative/Positive

Anti-SS-B

Negative

Negative/Positive

Anti-Scl-70

Negative

Negative/Positive

Anti-Jo-1

Negative

Negative/Positive

Anti-Centromere B

Negative

Negative/Positive

Anti-nucleosomes (NUC)

Negative

Negative/Positive

Anti-histone

Negative

Negative/Positive

Anti-ribosomal-P-protein

Negative

Negative/Positive

Anti-NMDAR

Negative

Negative/Positive

Anti-CASPR2

Negative

Negative/Positive

Anti-AMPAR1

Negative

Negative/Positive

Anti-LGI1

Negative

Negative/Positive

Anti-AMPAR2

Negative

Negative/Positive

Anti-GABARB1/B2

Negative

Negative/Positive

  1. RF Rheumatoid Factor; C3 complement 3; C4 complement 4; Anti-thyroid peroxidase Ab anti-thyroid peroxidase antibody; Anti-ds DNA Ab (CLIA) anti-double stranded DNA antibody (Clinical Laboratory Improvement Amendments); Anti-CCP Ab anti-cyclic citrullinated peptide antibody; ANA anti-nuclear antibodies; Anti-RNP/Sm anti-nuclear ribonucleoprotein/Smith antibody; Anti-Sm anti-Smith antibody; Anti-SS-A anti-Sjögren's syndrome related antigen A antibody; Anti-SS-B anti-Sjögren's syndrome related antigen B antibody; Anti-Scl-70 anti-scleroderma 70 antibody; Anti-Jo-1 anti-histidy tRNA synthetase antibody; Anti-NMDAR anti-Anti-N-methyl D-aspartate receptor antibody; Anti-CASPR2 anti-contactin associated protein-like receptor 2 antibody; Anti-LGI1 anti-Leucine–Rich Glioma-Inactivated 1 antibody; Anti-AMPAR2 anti-α-amino-3-hydroxy-5-methyl-4 isoxazolepropionic acid receptor 2 antibody; Anti-GABARB1/B2 anti-gamma aminobutyric acid receptor B1/B2 antibody