Complete recovery from paraquat poisoning causing severe unilateral pulmonary lesion.

Poisoning by paraquat, a plant-protecting agent, its clinical manifestations and treatment are discussed. The case of a 5-year-old boy who had ingested an unknown quantity of paraquat is described. Peritoneal dialysis proved to be effective in overcoming renal and hepatic failure. Subsequently, a pulmonary lesion with unilateral preponderance developed; this showed marked radiological regression and in a year nearly complete functional recovery ensued.