PMC3683172_01
CT scans reveal an hyperintense lesion occupying the CPA cistern with compression of adjacent parenchima
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PMC3683172_01_SNI-4-67-g001.jpg
F1
A computed tomography (CT) scan showed a 3 cm hyperdense mass occupying the CPA cistern with compression on adjacent cerebellar parenchyma [Figure 1].
(a) T1 WI shows an isointense part (light arrow) surronded by an hypointense part. (b) T2 WI shows a more evident hypointense ring and the presence of a hyperintense area surronding the lesion (thick arrows)
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PMC3683172_01_SNI-4-67-g002.jpg
F2
T1-weighted images the roughly ovular mass appeared formed by an isointense inner core surrounded by a hypointense ring [Figure 2a], the latter compatible with hemosiderin signal. This hypointense ring was even more evident in T2-weighted images [Figure 2b], which highlighted also a clear hyperintense signal in an adjacent area expression of a recent bleeding (thick arrow).