Although some earlier studies did report loss of these neuronal types in MS,unchanged densities have also been found.5,6,22 These varying reports couldbe due to variations in the investigated brain regions or cortical layers, or couldbe due to the relatively low number of interneurons.23 By contrast,NeuN+-expressing neuron densities were higher in MS NAGM compared to NCand MS demyelinated cortex. Here, RBFOX3 is linked to myeloid sarcoma.