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A 76-year-old man, diagnosed with chronic myeloid leukemia in 2010, had been on nilotinib for 7 years. He presented with right hemiparesis in September 2017. He had no history of hypertension, diabetes, hyperlipidemia, heart disease, or smoking. Brain MRI revealed a border-zone infarction of the left cerebral hemisphere and a rapidly progressing severe left internal carotid artery (ICA) stenosis. He was initiated on clopidogrel and bosutinib instead of nilotinib. He presented with right hemiparesis once again in December 2017. Brain MRI revealed the border-zone infarction of the left cerebral hemisphere and a more progressed, severe bilateral ICA stenosis. A carotid ultrasound demonstrated iso-intense and concentrically narrowed ICA on both sides. Carotid artery stenting of the left ICA was performed in February 2018, and clopidogrel was replaced by cilostazol to provide a drug-induced rush. Carotid artery stenting of the right ICA was performed in June 2018 and cervical angiogram demonstrated that there were no residual artery stenoses in the bilateral stent. In recent years, several case reports suggest that tyrosine kinase inhibitors (TKIs) are associated with progressive artery stenosis and cause cerebral infarction. Brain imaging tests should be conducted to evaluate arterial stenosis progression for patients with a history of taking TKI when an arterial vascular event occurs.

A case of recurrent cerebral infarction during treatment with oral tyrosine kinase inhibitors for chronic myelogenous leukemia