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  • Title: [Posttraumatic pseudoaneurysm of the middle meningeal artery: a case report].
    Author: Kimura T, Sako K, Satoh M, Nakai H, Yonemasu Y, Takeuchi E, Ishikura H.
    Journal: No Shinkei Geka; 1995 Nov; 23(11):1021-5. PubMed ID: 7477711.
    Abstract:
    An epidural hematoma associated with posttraumatic pseudoaneurysm of the middle meningeal artery is a very rare clinical entity. Only 31 such cases have been reported in the literature. A 54-year-old man was admitted with lethargy and right hemiparesis. A skull X-ray film revealed a linear fracture in the left parietal and temporal bone, extending to the base of the skull. A brain CT scan disclosed an acute epidural hematoma over the left cerebral hemisphere, contusional hematoma in the right frontal lobe and thalamus, and subarachnoid hemorrhage in the left Sylvian fissure. During an emergency craniotomy a large epidural hematoma was evacuated and external decompression was performed. Angiography, which was performed about one month after the head injury, revealed an aneurysm of the middle meningeal artery. The aneurysm was removed to avoid delayed rupture at the time of cranioplasty. Histological diagnosis was pseudoaneurysm. We discussed the pathogenesis of a pseudoaneurysm of the meningeal artery and the necessity to pay attention to the presence of a pseudoaneurysm when an active bleeding point is not observed during surgery of the epidural hematoma.
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