Intra-operative Use of Indigo Carmine Dye for the Delineation of Ill Defined Tumor Borders Using Stereotactic Injection

During resection, a small quantity of a special dye called indigo carmine will be infused at the margins of the tumor using computer-guided stereotactic navigation equipment. This dye will be visible during the tumor resection and it can potentially serve as an additional marker of the tumor margins. A post-operative MRI scan -which is part of the standard care- will accurately measure the extent of tumor resection.