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