AutoAbs in poly/dermatomyositis - ANA+ 50% to 80%, but not helpful in Dx. Look for MSA Abs - espec antisynthetase ABs (anti-Jo-1), but also newer Abs: MDA-5, TIFF-1 gamma, NXP-2 (to be discussed #RNL24 Dr. Christopher-Stine) https://t.co/ZRlMPE48qX https://t.co/kxD1jw832C https://t.co/afC617tbmq