Figure 11b. Occipital dermoid cyst. Sagittal T2-weighted (a) and axial contrast-enhanced T1-weighted (b) surface coil MR images show a midline suboccipital cystic lesion (white arrow), with a sinus tract in the occipital bone (black arrow) and an infratorcular intracranial connection. The enhancement is due to infection of the cyst.