In fact, the reason why 80 to 90 percent of those brain cancer surgeries ultimately fail is because of those small little extra margins that were left positive, those small little leftover tumors that were left there.
De fapt, 80-90 de procente din operațile de cancer pe creier eșuează din cauza acelor mici margini care au fost lăsate, micile rămășițe de tumori care au fost lăsate acolo.