Hirotaka Nomiya, Tadanori Hamano, Naoko Takaku, Hirohito Sasaki, Kojiro Usui, Sayaka Sanada, Tomohisa Yamaguchi, Yuki Kitazaki, Yoshinori Endo, Tomoko Kamisawa, Soichi Enomoto, Norimichi Shirafuji, Akiko Matsunaga, Asako Ueno, Masamichi Ikawa, Osamu Yamamura, Minoru Hasegawa, Hirohiko Kimura, Ichizo Nishino, Yasunari Nakamoto
Anti-mitochondrial M2 antibody (AMA-M2)-positive myositis is an idiopathic inflammatory myopathy (IIM). Of all patients with myositis, 2.5-19.5% have AMA-M2 antibodies. However, the detailed distribution of muscles affected in AMA-positive myositis is unknown. Therefore, we examined lower muscle magnetic resonance imaging (MRI) findings of patients with AMA-positive myositis. Among the 63 patients with IIM at our institute, 5 (7.9%) were positive for AMA-M2 antibodies. However, one was also positive for anti-Jo1 antibodies; therefore, four patients were finally participated in this study...
July 25, 2023: Neuromuscular Disorders: NMD