Colloid Cyst

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Non enhanced CT showing little Colloid Cyst (CC) that has characteristic hyperdense appearance and location. This CC is located slightly posteriorly to the foramina of Monro and not causing obstructive hydrocephalus. Note open foramina of Monro on the lower set of images. The ventricular system is dilated however, that is most likely due to central atrophy. Note also general cortical atrophy supra- and infratentorial.

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Dilated Perivascular Spaces in the Brain

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