Anti-nuclear matrix protein 2+ juvenile dermatomyositis with severe skin ulcer and infection: A case report and literature review

Table 1 Laboratory examinations at the first hospital admission

Laboratory examinations
CBC	WBC: 6.71 × 109/L, PLT: 165 × 109/L, L: 0.37, N: 0.54, Hb: 120 g/L, CRP < 8 mg/L
Biochemical examination	CK: 12647 U/L, LDH: 1358 U/L, ALT: 116.6 U/L, AST: 359.5 U/L
ESR	79 mm/h
Ferritin	726 ng/mL
Autoantibody profile	Negative
Immunoglobulins	Normal
Complements	Normal
MSA	Anti-nuclear matrix protein 2 antibody positive

ALT: Alanine aminotransferase; AST: Aspartate transaminase; CBC: Complete blood count; CK: Creatine kinase; ESR: Erythrocyte sedimentation rate; LDH: Lactate dehydrogenase; MSA: Myositis-specific autoantibody.