MHC-I and -II immunostainings. In PM (A, E), MHC-I staining was more sarcoplasmic while MHC-II immunoreactivity was mostly sarcolemmal. In DM (B, F), staining of sarcolemmal MHC-I was more complete than partial, and MHC-II immunostaining was mostly sarcolemmal. In NIMs (C, G), both MHC-I and MHC-II staining were mainly partial sarcolemmal. There was no immunoreactivity in normal control samples (D, H). (Original magnification ×200, Scale bar = 300 μm).