Case Report
When Should a Patient with Statin-Induced Myopathy Be Re-challenged? A Case of Necrotizing Autoimmune Myopathy
Table 1
Myositis panel was negative except for SSA 52 Ab IgG which was equivocal.
| Antibody | Result | Reference value |
| SSA 52 (Ro) Ab IgG | 32 AU/mL | <29 AU/mL negative, 30–40 AU/mL equivocal, >41 AU/mL positive | SSA 60 (Ro) Ab IgG | 4 AU/mL | <29 AU/mL negative | Ribonuclei protein U1 Ab IgG | 0 AU/mL | <29 AU/mL negative | Jo-1(histidyl-tRNA synthetase) Ab, IgG | 0 AU/mL | <29 AU/mL negative | PL-12(alanyl-tRNA synthetase) Ab | Negative | Negative | PL-7(threonyl-tRNA synthetase) Ab | Negative | Negative | EJ (glycyl-tRNA synthetase) Ab | Negative | Negative | OJ (isoleucyl-tRNA synthetase) Ab | Negative | Negative | SRP (signal recognition particle) Ab | Negative | Negative | Ku Ab | Negative | Negative | PM/SCL 100 Ab IgG | Negative | Negative | U2 sn (small nuclear) RNP Ab | Negative | Negative | Fibrillarin (U3 RNP) Ab, IgG | Negative | Negative | Mi-2 (nuclear helicase protein) Ab | Negative | Negative | P155/140 Ab | Negative | Negative | TIF-1 gamma (155 kDa) Ab | Negative | Negative | SAE1 (SUMO activating enzyme) antibody | Negative | Negative | MDA5 (CADM-140) Ab | Negative | Negative | NXP-2 (nuclear matrix protein-2) Ab | Negative | Negative |
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