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Background: One of the most serious and potentially life-threatening adverse events associated with anterior cervical spine surgery is postoperative hematoma with acute airway obstruction. The causes of unpredicted delayed bleeding are, however, not fully elucidated. Here, we report a case of delayed arterial bleeding and sudden airway obstruction following a two-level ACDF. Case Description: A 52-year-old male presented with the right paracentral disc herniations at the C4–C5 and C5–C6 levels. A two-level ACDF was performed. Notably, on the 5th postoperative day, the patient developed an acute respiratory distress due to a large right lateral retrotracheal hematoma requiring emergency evacuation at the bedside. This was followed by formal ligation of a branch of the right superior thyroid artery in the operating room. In addition, an emergency tracheotomy was performed. By postoperative day 15, the tracheotomy was removed, and the patient was neurologically intact. Conclusion: A superior thyroid artery hemorrhage should be suspected if a patient develops delayed neck swelling with or without respiratory decompensation several days to weeks following an ACDF. Notably, these hematomas should be immediately recognized and treated (i.e., decompression starting at the bedside and completed in the operating room) to prevent catastrophic morbidity or mortality.

Life-threatening delayed arterial hemorrhage following anterior cervical spine surgery: A case report and literature review