原级：biopsy
1. Doctors have long had doubts that early detection of tumors could improve survival, and also feared that screening would lead to too many false alarms and unnecessary biopsies.
2. One reason is the test's error rate, which can lead to unnecessary biopsies.
3. This allows them to do periodic biopsies to watch for signs of rejection without scarring her new face.
4. Some parents had agreed to minor biopsies but had not agreed that organs should be retained.
5. She feels that way despite MRI errors that led to two unnecessary biopsies.
6. \u0039\u0031\u0031\u67E5\u8BE2\u00B7\u82F1\u8BED\u5355\u8BCD
6. Breast MRIs should be done at places that do biopsies as well, they said.