Computed tomography (CT) of the chest without contrast demonstrating a 3.2 cm (cranial/caudal) by 2.5 cm (anterior/posterior) Y-shaped foreign body within the anterior-superior mediastinum in the region of the esophagus. There is gas surrounding the mass. The foreign body has bone density and the gas is in part extraluminal. Edema is present in the circumference of the foreign body and is thought to shift the trachea from the left to the right, with compression of the airway. The soft tissue swelling is also evident surrounding the foreign body and esophagus, reflective of local inflammatory changes and hematoma secondary to the fistula connection between the esophagus and proximal innominate artery. (a) Coronal view. (b) Sagittal view. (c) Axial view.