In the editorial “Is progressive multiple sclerosis a gray matter disease?” (Annals of Neurology 2008;64(3):230-232), please note the following corrections to the figure legend:

Fig. Paraffin sections immunohistochemically stained with anti-proteolipid protein antibody (A, B) and corresponding T2-weighted magnetic resonance (MR) images (C, D) from a patient with chronic extensive cortical subpial demyelination (A, C) and from a patient with little cortical demyelination (B, D). Demyelinated cortical areas are visible in immunohistochemical stainings (A, B; blue outlines) but not on MR imaging. White matter demyelination (A, B; red outlines), detectable by MR imaging (C, D; arrows), did not correlate with the extent of cortical gray matter demyelination. (Reprinted from Bö and colleagues,25 by permission.)