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[Plaque characterization using carotid MRI in acute ischemic cerebrovascular syndromes (three case reports)--can carotid MRI be useful as an adjunct to the diagnosis of TIA in which the ischemic lesions were recognized at a later date?]. | LitMetric

AI Article Synopsis

  • - Recent studies show that nearly half of TIA patients have detectable ischemic lesions on diffusion-weighted imaging (DWI), even if not visible at first.
  • - This report presents three cases of late-imaged TIA where patients initially showed no lesions but later displayed lesions in brain areas related to sensory or motor function.
  • - Carotid MRI revealed atherosclerotic plaques in these patients, suggesting that these plaques may cause embolism leading to TIA, highlighting the importance of using Carotid MRI for diagnosis.

Article Abstract

Recent diffusion-weighted imaging (DWI) studies describe a relevant ischemic lesion in almost half of all patients with transient ischemic attack (TIA). We report 3 cases of TIA in which the ischemic lesions were recognized on DWI at a later date ("late-imaged TIA"). Three men (average age, 72.7 years) were admitted to our hospital on complains of monoparesis or sensory disturbance in their right arms. On admission, no apparent ischemic lesion was detected by DWI; however, spotty lesions were apparent in the left precentral or postcentral gyrus on hospital days 2-5. The neurological symptoms resolved within 24 hours, and all the cases were clinically diagnosed as TIA. Carotid MRI revealed low-grade stenosis of the left internal carotid artery with atherosclerotic plaque, characterized as so-called "vulnerable plaque". These findings suggest that the carotid atherosclerotic plaque lead to artery-to-artery embolism. Carotid MRI is considered useful as an adjunct to other imaging modalities in the diagnosis of late-imaged TIA.

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