Immunopattern III multiple sclerosis/Baló concentric sclerosis. Demyelination is characterized by A, a preferential loss of the myelin protein myelin-associated glycoprotein (MAG) seen on MAG immunohistochemical (IHC) staining (scale bar = 1.5 mm), while other myelin proteins such as B, proteolipid protein (PLP) (PLP IHC, scale bar = 1.5 mm), and C, myelin oligodendrocyte glycoprotein (MOG) (MOG IHC, scale bar = 1.5 mm), are partially preserved.