TRIM21 and myositis disease: The autoimmune origin was investigated through the research of specific myositis autoantibodies panel [12]: Anti-Nuclear Antibodies (ANA) resulted in mildly positive with 1:80 antibody dilution; autoantibodies anti-Mi2/alpha and beta nucleosome remodeling and deacetylase complex, anti-DNA, SRP (signal recognition particle), PL7 (threonyl), PL-12 (alanyl), EJ (glycyl), OJ (isoleucyl), Jo 1 (antihistidyl-tRNA synthetase), PM-Scl100 and PM-Scl75, Ro-52, NXP2, TIF 1g, SAE1 and MDA5 resulted negative.