[Intraventricular contrast medium (non-ionic water soluble dimer) residue a month after injection; a case report]

We report a case with non-ionic water soluble dimer contrast media residue in the lateral ventricle a month after administration into the lateral ventricle. We believe that, in this subarachnoid hemorrhage patient, the intraventricularly instilled contrast media mixed with preexisting blood, aggregated and adhered to the ventricular wall.