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Toxic metals in the pons of a person with MS. Posterior pons: metals present in the locus ceruleus (within dashed circles) are silver, aluminium, iron, mercury, nickel, and lead. Iron and nickel are seen in subpial regions adjacent to the cerebrospinal fluid (arrowheads). Anterior pons: silver, iron and lead are present in white matter regions, and iron around blood vessels (arrow). Methods: adapted from (26).
