ARM B (INTRATUMORAL AND RESECTION CAVITY ADMINISTRATION): Patients undergo stereotactic biopsy (to confirm the diagnosis) and placement of a catheter within the tumor, followed by carcinoembryonic antigen-expressing measles virus intratumorally (IT) through the catheter over 10 minutes on day 1. Patients then undergo en block resection of their tumor with computer-assisted stereotactic techniques on day 5, followed by MV-CEA administered around the tumor bed.