“Hookworms Found in Duodenum of Patient with Severe Iron Deficiency Anemia and Chronic Gastrointestinal Bleeding via Esophagogastroduodenoscopy after Negative Stool Examinations”

https://pubmed.ncbi.nlm.nih.gov/38116465

A patient with severe iron deficiency anemia and chronic gastrointestinal bleeding was found to have hookworms in the duodenum through esophagogastroduodenoscopy, after repeated stool examinations were negative.