[Dysphonia following glyphosate exposition].
Glyphosate is a commonly used nonselective herbicide which inhibits plant growth through interference with the production of essential aromatic amino acids. Toxicity for humans has been reported after suicidal ingestion. Here we describe a 26-year-old teacher who used glyphosate correctly but suffered from severe dysphonia after some hours. Laryngostroboscopy revealed decreased vocal fold mobility suggesting innervation impairment. The symptoms resolved spontaneously 6 weeks later and vocal fold mobility returned to normal. Glyphosate neurotoxicity has been discussed in the literature therefore, the dysphonia observed here may have been due to an intermittent neuropraxia of the laryngeal nerve. However, to our knowledge a similar case has not been reported in literature.
Klinik und Poliklinik für Phoniatrie und Pädaudiologie (OE 6510), Medizinische Hochschule Hannover, 30625 Hannover. Ptok.Martin@mh-hannover.de
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D000328:Adult; D055154:Dysphonia / Q000139:chemically induced*; D005998:Glycine / Q000031:analogs & derivatives* / Q000633:toxicity; D006540:Herbicides / Q000633:toxicity*; D006801:Humans; D007823:Laryngeal Nerves / Q000187:drug effects; D008297:Male; D014826:Vocal Cord Paralysis / Q000139:chemically induced*; D000097797:Glyphosate
D005998:Glycine; D006540:Herbicides; D000097797:Glyphosate