Do you pursue a malignancy workup beyond age-appropriate malignancy screening in patients with antibody negative necrotizing myopathy?  

This is a great question that speaks to the nuanced (and still-being-elucidated) association between malignancy and the increasingly better sub-divided different autoimmune myositis subtypes:While anti-SRP and anti-HMGCR are the two myositis-specific antibodies (MSA) most closely associated with imm...