PMC3512331_01
Axial CT scan showing hyperdense fourth ventricle mass lesion with contrast enhancement and obstructive hydrocephalus
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F1
On a computed tomographic (CT) scan, the mass lesion was hyperdense with contrast enhancement [Figure 1a and b]. A well-delineated mass within the ventricle was present, determining a gross obstructive hydrocephalus and effacement of the convexity sulci [Figure 1c].
Axial (a), sagittal (b) and coronal (c) contrast-enhanced T1-weighted MRI scans demonstrate the fourth ventricle lesion with intense enhancement
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F2
Brain magnetic resonance imaging (MRI) was performed on the patient, demonstrating a large 3 x 4 x 3 cm3 intraventricular lesion with irregular contrast-enhancing margins [Figure 2].
Postoperative axial CT scan showing tension pneumoventricle
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F3
The CT scan, performed immediately after decline of the patient's condition, revealed the presence of prominent intraventricular air with dilatation of the lateral and third ventricles as transependymal fluid passage [Figure 3].
Axial CT scan performed after placement of the external ventricular drain showing partial resolution of the intraventricular pneumocephalus
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F4
The following day, a CT scan demonstrated a marked improvement of the pneumoventricle [Figure 4].
Postoperative contrast-enhanced axial (a), sagittal (b), and coronal (c) T1-weighted MRI scans confirm the complete resection of the tumor
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F5
An MRI revealed total tumor resection [Figure 5].