Endovascular Treatment of Carotid Blowout Syndrome.

INTRODUCTION: Carotid blowout syndrome (CBS) is a life threatening complication associated with head and neck cancers (HNC) and its treatment. The mortality rate was reported to range from 3% to over 50% in the literature. Direct surgical repair of the ruptured internal carotid artery is often not technically possible due to the difficult anatomy and underlying poor co-morbid status. Endovascular techniques such as coil embolization and stent grafting offer an alternative to surgical ligation with better patient outcomes.

METHODS: We describe the successful use of an endovascular approach in a case of emergent rupture of the common carotid artery (CCA) with massive bleeding in a patient submitted to radiotheraphy for the treatment of a neck malignancy.

RESULTS: A 75-year-old man with a squamous cell carcinoma of the esophagus having undergone chemotherapy and radiotherapy, was admitted to the emergency room with haematemesis with approximately 1 hour of evolution. An angiogram revealed, in the right common carotid artery, contrast extravasation with a possible fistula communicating to the esophagus. A self-expandable covered stent was deployed in the right common carotid artery. Successful repair of the vessel was confirmed in the control angiogram. The patient was discharged 10 days later without neurological deficit or recurrent bleeding. Carotid blowout syndrome is one of the most complex bleeding complications that may occur in HNC patients. It is usually a life-threatening event and is accompanied with unexpectedly massive bleeding and high mortality/morbidity rates. Short and long term effects of radiation over arteries have been reported. Radiation can induce damage to the vasa vasorum of large arteries and it might lead to the rupture of arteries. In the HNC population with previous surgery or radiotherapy, a high index of suspicion must be maintained for CBS in patients presenting with any recent history of oral bleeding or haemorrhaging from an exposed neck wound.

CONCLUSION: Current evidence shows that there was no significant difference in technical and hemostatic outcomes between the reconstructive and deconstructive endovascular methods. Permanent vessel occlusion resulted in higher immediately cerebral ischemia and stent grafting induced the more potentially delayed complications, such as infection, rebleeding, and stent thrombosis. In the present case, the endovascular management of CBS of the common carotid artery had high technical success and allowed immediate haemostasis. It has been suggested that self-expanding stent-grafts are useful for the initial control of carotid bleeding but are associated with more delayed complications.