realized in response to stimulus iron atom heavy metal poisoning poisoning iron poisoning https://github.com/monarch-initiative/mondo/issues/5528 MONDO:0800385 A heavy metal poisoning that is caused by exposure to iron. Iron toxicity is classified as corrosive or cellular. Ingested iron can cause direct caustic injury to the gastrointestinal mucosa, resulting in nausea, vomiting, abdominal pain, and diarrhea. iron overload iron toxicity