Carotid stent extrusion following carotid blowout

Abstract

Objective: We describe an unusual foreign body, a carotid stent extruded into the upper airway, and discuss the predisposing factors.

Methods: This is a single patient case report with review of the literature.

Results: Our patient is a 59 year old female treated for T3N2aM0 (stage IVa) left tonsil squamous cell carcinoma who experienced a carotid blowout treated by carotid stent placement with subsequent carotid coiling and vessel takedown. Approximately ten months later, she coughed and expelled approximately 3cm of tubular stent-appearing material into her airway causing acute stridor and dysphagia. CT angiography (CTA) showed the distal and proximal stent in proper position without evidence of extravasation. The stent was extracted transorally showing the distal end of the carotid to be patent and covered by fibrin within its lumen. Review of the literature shows that such stent extrusions, although rare, do occur.

Conclusion: Carotid stents are a valuable tool in cases of carotid blowout. However, long-term data on patient prognosis is lacking. The foreign body response triggered by stent placement can cause dislodgement. The potential for stent extrusion is greatest in patients who have preexisting ulceration or who have undergone radiation, both common in head and neck cancer patients.

Keywords: Airway foreign body; Carotid blowout; Intraoperative brachytherapy; Stent extrusion; Tonsil cancer.