Abstract
AbstractAlthough diagnosis of dissection in the anterior cerebral artery (ACA) has increased, cerebral infarction in frontal lobe due to contralateral ACA dissection is rare. A 52‐year‐old woman developed headache and motor weakness in the left hemibody. Magnetic resonance images demonstrated a fresh cerebral infarction in the right frontal lobe and thin right ACA. The initial diagnosis was a cerebral infarction in the right frontal lobe due to right ACA stenosis. Angiography performed nine days after onset showed dilatation and stenosis of the left ACA, and a small diameter of the right ACA. An intramural thrombus in the left ACA was demonstrated on MRI. The diagnosis was a cerebral infarction in the right frontal lobe due to dissection of the contralateral left A2 and A3 of ACA. There is a possibility that cerebral infarction in frontal lobe is induced by the contralateral ACA abnormality in a case with bihemispheric ACA.
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