Mochi-Induced Duodenal Obstruction and Ulcers: A Case Report

Mochi, or rice cake, is a highly adhesive food, and it is known to cause small bowel obstruction and gastric ulcers. However, reports of duodenal involvement due to mochi are rare. We report a case of duodenal obstruction and ulcers caused by mochi. A 64-year-old man with a history of diabetes mellitus presented with abdominal pain and vomiting after consuming mochi. Computed tomography (CT) of the abdomen revealed multiple high-density materials in the duodenum and stomach. Endoscopy identified multiple ulcers in the duodenum and stomach, along with mochi impaction in the duodenum. The obstruction was successfully relieved by endoscopic fragmentation. In patients with diabetes mellitus, impaired gastrointestinal motility may contribute to duodenal obstruction by mochi. When high-intensity material is observed in the stomach or duodenum on CT, confirming dietary intake is crucial for an accurate diagnosis.