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Most keywords used and number of its occurrence_
| No | Keyword | Occurrence |
|---|---|---|
| 1 | Breast cancer | 1606 |
| 2 | Breast neoplasms | 1160 |
| 3 | Cancer recurrence | 873 |
| 4 | Tumor volume | 786 |
| 5 | Breast tumor | 690 |
| 6 | Neoplasm recurrence, local | 639 |
| 7 | Cancer staging | 604 |
| 8 | Prognosis | 586 |
| 9 | Tumor recurrence | 559 |
| 10 | Cancer size | 501 |
| 11 | Cancer grading | 434 |