Pure posterior communicating artery occlusion treated with mechanical thrombectomy

There has been no report of mechanical thrombectomy for a pure posterior communicating artery (PComA) occlusion. Here, we report the case of an 87-year-old woman with a disturbance of consciousness and left hemiparesis diagnosed with a right PComA occlusion. The patient was successfully treated using mechanical thrombectomy in combination with a stent retriever and the Penumbra system. A CT perfusion image showed cerebral blood flow reduction in the ipsilateral occipital lobe and thalamus. A CT angiography supported the diagnosis of an occlusion of fetal type PComA. The PComA could not be detected by internal carotidangiogram, but after deployment of stent retriever, the PComA was recanalised and distal embolus at the right posterior cerebral artery was visualised. The thrombus was then removed using the Penumbra system. Although the treatment for a PComA occlusion requires further investigation, the present case supports a thrombectomy as an effective rescue strategy for PComA occlusions.

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