Table 2.

Patients who were positive by Euroimmun (≥15) but negative by OMRF testing. Clinical features of antisynthetase syndrome are displayed. Several patients were also found to be positive for other autoantibody specificities on EBO.

Patient positive by EBO≥15 but negative by OMRF	Inflammation on muscle biopsy	Fever (>100.4F)	Interstitial lung disease	Mechanic’s hands	Raynaud’s phenomenon	Inflammatory arthritis	Additional antibody specificities observed on EBO
	N, (%)	N, (%)	N, (%)	N, (%)	N, (%)	N, (%)
PL7 (N=10)	5 (50)	1 (10)	3 (30)	3 (30)	6 (60)	2 (20)	Jo1 (3), PL12 (1), Ku (1)
PL12 (N=4)	2 (50)	0 (0)	2 (50)	1 (25)	2 (50)	2 (50)	Jo1 (2), PL7 (1)
OJ (N=2)	0	0	0	0	0	0	SRP (1)
Jo1 (N=2)	0	0	0	0	0	0	SRP (1), Ku (1)
EJ (N=1)	1 (100)	0	0	0	0	1 (100)	SRP (1)