Clinical Significance of Hyperdense Lesions on Non-enhanced Brain CT Obtained Immediately after Arterial Revascularization in Acute Ischemic Stroke Patients

Figure 2

CT scan of a 62-year-old man who had a sudden onset of impaired right limb movement. (a). The non-enhanced brain CT scan obtained immediately after intra-arterial thrombolysis showing a hyperdense area in the head portion of the left caudate nucleus and the entire left lentiform nucleus. Representative type II, namely solid “mass” shaped lesions with well-defined boundaries and without mass effect. (b). Follow-up CT scan obtained 48 hours after the end of intra-arterial thrombolysis. The range of the hyperdense area increased slightly and the attenuation decreased. The patient was not accompanied by deterioration of neurological symptoms. (c). On the 2nd day after the procedure, susceptibility weighted imaging showed patchy low signal in the left basal ganglia region, indicating hematoma formation. (d). Two weeks after the procedure, the left basal ganglia hematoma had been completely absorbed.

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