FIG 7. Right pontocerebellar cistern epidermoid cyst.

A, T1-weighted image. The cystic content (arrow) is slightly hyperintense to CSF (see compressed fourth ventricle).

B, T2-weighted image. The cystic content (arrow) is isointense to CSF. The T2-weighted image also shows a right temporal gliotic area (arrowhead).

C, PD-weighted sequence. The cystic content (arrow) is slightly hyperintense to CSF.

D, FLAIR sequence. The cystic content (arrow) is markedly hyperintense when compared with CSF. In this case, the content of the cyst was not saturated from using FLAIR and the lesion was misclassified as non-free water<<014>>like. The FLAIR image also shows a right temporal gliotic area (arrowhead).