Abstract
A 41-year-old vintner attempting suicide ingested 8-9 g of arsenic and developed a symmetric polyneuropathy with acute Wallerian degeneration of myelinated fibers. Under treatment with modified British Anti-Lewisite (BAL; "Dimaval") his polyneuropathy slowly, but incompletely, subsided over three years at which time another sural nerve biopsy specimen showed regenerative proliferation of myelinated and unmyelinated axons but no signs of Wallerian degeneration. By laser microprobe mass analysis (LAMMA) arsenic was located in the first biopsied sural nerve specimen but not in the second specimen. These findings demonstrated: 1) arsenic induced serial morphometric and electron microscopic findings of nerve fiber degeneration and regeneration, 2) documentation of arsenic within myelinated nerve fibers, and 3) the usefulness of the LAMMA technique as a diagnostic procedure in this context.
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