CED catheter implantation
silicone ventricular catheters, tumor, CED
TUMOR
Preoperative magnetic resonance imaging (MRI) was used to plan catheter placement. Using iPlan Flow software (Brainlab AG Munich), drug infusion was simulated and catheter target positions optimized for maximal coverage of both tumor and surrounding parenchyma. Three modified silicone ventricular catheters (Medtronic) were used for CED and placed according to guidelines [