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Mechanical thrombectomy has become the most effective treatment for intracranial artery occlusion; however, it is difficult to recanalize acute arterial occlusion resulting from atherothrombotic causes. We describe a 44-year-old man diagnosed with cerebral infarction associated with acute right middle cerebral artery occlusion. During emergency mechanical thrombectomy, atheromatous disease was identified by deployment of a stent retriever. The stent retriever was reinserted within a microcatheter and retrieved. After the procedure, the right middle cerebral artery was recanalized, although severe stenosis persisted. We recommend mild angioplasty with a stent retriever for patients with atherothrombotic intracranial artery occlusion as an optional treatment for avoiding damage to the vessel wall, and plaque shift to the perforating arteries.