Giant gastric polyp mimicking a duodenal tumor

Abstract

Inflammatory fibroid polyps are very rare gastrointestinal tumors. We present the case of a 66-year-old woman with severe anemia and a giant gastric polyp which had intermittent duodenal intussusception. Ultrasonography showed increased gastric wall thickness and suspected an ampulloma, as revealed also by endoscopy and computed tomography. Ultrasonography reassessment showed later the intragastric mass, which was confirmed by endosonography: giant pediculated hypervascular polyp suggesting malignancy. Challenging phenomena at different investigation methods were due to intermittent protrusion into the first duodenal segment mimicking an ampulloma, but without gastric outlet syndrome or a malignant component, despite the severe anemia. Abnormal US aspect of the stomach in clinical context of anemic syndrome, requires EUS with biopsies in order to confirm underlying lesions. The particularities of this case are the: discordance between imaging aspects and the protrusion into the first duodenal segments with consecutive cholestasis mimicking an ampulloma and the lack of gastric outlet syndrome.