Paraquat is a potent herbicide of lethal toxicity. Its injury
mechanism is attributed to the generation of very-reactive oxygen
species, such as superoxide radicals, through which multiple injuries
are produced on mucosa, although there have been no reports of injuries
on the trachea. We describe a case of fatal paraquat poisoning with
tracheal injuries, where the clinical debut was acute respiratory
insufficiency and a spontaneous pneumothorax.