. >> reporter: two peruvian neurosurgeries, half a dozen residents, observing dr.evy's every maneuver. >> in this case the patient's in trusted hands. we just have to go figure that out. >> reporter: they spent three hours and manuel's mother is anxiously waiting for news. she's saying there's nothing in the world that she wishes than to see him and hug him. but an hour later, a humbling discovery. >> i think it's an optic nerve glioma. >> the boy's situation just got worse. we think it's a glioma, which is the worst type of brain cancer to have. it changes the goal of the operation. if it were a certain type of cancer, we try to get it all out. we take what we can safely. nightmare for him and his mom is just beginning. >> reporter: the pathology test results return confirming that the tumor is, in fact, malign t malignant. >> so there's no surgery we can do at this point. that's unfortunate. >> reporter: five hours of surgery are little help for manuel. he'll have to undergo chemo and radiation. how do you feel about the operation? >> i feel pretty [ bleep ] abou