During last 7 years, 13 cases of acute ethylene glycol poisoning have been observed with 4 fatal outbreaks. All cases--except one--were accidental. Six patients had drunk a mixture of antifreeze in water as they were lost in a desert. A patient who had taken 970 ml of ethylene glycol survived. In one case, death was due to irreversible brain damage; two other fatalities occurred from cardiorespiratory distress. CNS involvement was noticed in 8 cases and acute renal failure-constantly controlled-occurred in 9 patients. Post mortem examination has shown bi-refringent calcium oxalate crystals in both kidney and brain. Specific treatment with ethanol has been performed in 3 cases with ingestion of large amounts of toxic who were seen before definitive renal lesions have occurred. Emphasis is placed in symptomatic treatment including gastric lavage, extrarenal epuration and conservative management.