Ocular silicone oil in the lateral cerebral ventricle.

Silicone oil used for endotamponade of retinal detachment may migrate into the subarachnoid space of the brain, including the cerebral ventricles, presumably by extension through silicone oil-filled spaces in the optic nerve. Silicone oil has characteristic appearances on CT scans and MRI, which can be utilized to distinguish it from more ominous entities. We describe a case of intraventricular silicone in a patient who presented with seizures.