Ultrasound diagnosis of an inflammatory granuloma secondary to a fishbone in the gallbladder

The accidental ingestion of a foreign body is common in clinic, of which fishbone is the most common. In most cases, the fishbone passes through the gastrointestinal tract without getting stuck (1). The rate of perforation is very low with reports of <1% of foreign bodies perforating bowel (2). Due to anatomy of the bowel, the most common site of perforation is the terminal ileum (3). Penetration in the duodenum and the development of a granuloma of the gallbladder is quite rare. Furthermore, the clinical symptoms with a foreign body perforation are nonspecific and different, and a definite preoperative diagnosis may be challenging.