 Given the high probability that the mass represents a high-grade glioma, the patient, after weighing the risks and the benefits of surgery, has agreed to undergo a surgical biopsy and resection of the mass as well as concomitant chemotherapy and radiation as the diagnosis demonstrates a high-grade glioma. 
Given the high probability that the mass represents a high - grade glioma , the patient , after weighing the risks and the benefits of surgery , has agreed to undergo a surgical biopsy and resection of the mass as well as concomitant chemotherapy and radiation as the diagnosis demonstrates a high - grade glioma .