Introduction: Poison control and toxicovigilance centers (CAPTV), which regularly deal with cases of corrosive substance ingestion, conducted an updated descriptive study of cases recorded over a one-year period. Objective: To identify the current characteristics of corrosive substance poisoning: affected population, type of poisoning, circumstances, products involved, severity, and clinical course. Method: Analysis of cases of corrosive substance ingestion using the CAPTV information system, based on cases documented by gastrointestinal endoscopy. Only cases with abnormal endoscopic findings were included. Results: Between April 1, 2009, and March 31, 2010, 353 patients had digestive endoscopic lesions following the ingestion of a substance. Ingestion was intentional in 56% of cases. One hundred four patients (29.4%) had mild damage (Grade 1) and 249 had Grade 2 damage. Bases were the cause in 42% of cases, oxidizing agents in 24%, and acids in 21% of cases. In the study population, 18 patients died and 60 experienced sequelae. Among accidental poisonings, there were no deaths, but grade 3 lesions were observed in 13 cases of ingestion of an unsealed product and in 5 cases of ingestion in children under 4 years of age. Conclusion: Toxicovigilance efforts focus on information regarding the dangers of product removal from packaging and on the accessibility of corrosive products to young children. The clinical course of individuals who attempted suicide reflects the severity of this type of ingestion. (R.A.)