PMC4533465_01
A: Preoperative magnetic resonance imaging (MRI) coronal view shows enlargement of bilateral ventricles. B: Bilateral subdural effusion shown by computed tomography (CT) performed 14 days after the left ventriculoperitoneal shunting. C, D: Petechial hemorrhage in the left frontal lobe shown by CT taken 2 months after the surgery. E: MRI shows progression of the size of the subdural effusion in both supra and infratent areas (arrowheads).
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F1
Computed tomography (CT) and magnetic resonance imaging (MRI) showed an enlargement of the bilateral ventricles (Fig. 1A). Bilateral subdural effusion also appeared (Fig. 1B). CT showed a brain edema with petechial hemorrhage in the left frontal lobe (Fig. 1C, D). MRI showed progression of the size of the subdural effusion in both supra and infratent areas (Fig. 1E).
A, B: Magnetic resonance venography (MRV) shows poor visualization of the superior sagittal sinus (red arrowheads) and the absence of one of the frontal cortical veins on the left side (yellow arrowheads). The frontal cortical vein on the opposite side is marked by blue arrowheads. C: Computed tomography (CT) surface image, the same view as in the MR venography in panel A. This shows the thrombus formation in the frontal cortical vein (arrowheads) from the puncture point (arrow) of the shunt tube to the superior sagittal sinus. D: CT coronal view shows thrombus formation (arrowhead) adjacent to the shunt tube and the puncture point (arrow) of the shunt tube. A: anterior, L: left, P: posterior, R: right.
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F2
MR venography (Fig. 2A, B) showed poor visualization of the superior sagittal sinus and the absence of one of the frontal cortical veins on the left side. A surface image reconstructed from noncontrast CT (Fig. 2C) and the CT coronal view (Fig. 2D) clearly demonstrated the thrombus formation in the cortical vein just adjacent to the shunt tube.