Neck hematoma is a complication of carotid endarterectomy, usually occurring in the comparatively early stage postoperatively. We described a patient developing life-threatening hemorrhage and non-clotting hematoma at a comparatively later stage after CEA. DIC was diagnosed according to the lab results, and the patient underwent re-operation and was supported with blood products until the coagulopathy was corrected. The patient had a history of prostatic hyperplasia and experienced malaise during the hospitalization. Prostate cancer with bone metastases was diagnosed. This case report describes a rare underlying cause of hematoma after CEA, which reminds us to pay attention to prostate symptoms or related medical history, especially malignancy, in surgical patients, which may result in severe complications.

中文翻译：

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颈动脉内膜切除术后迟发性血肿的异常原因：一例报告

颈部血肿是颈动脉内膜切除术的并发症，通常发生在术后的早期。我们描述了一名患者，在CEA后的较晚阶段出现危及生命的出血和非凝血性血肿。根据实验室检查结果诊断为DIC，患者接受了再次手术并获得了血液制品的支持，直到凝血功能障碍得到纠正。该患者有前列腺增生史，住院期间不适。诊断为具有骨转移的前列腺癌。该病例报告描述了CEA术后血肿的罕见潜在原因，这提醒我们要注意手术患者的前列腺症状或相关病史，尤其是恶性肿瘤，这可能会导致严重的并发症。