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False-positive and false-negative findings of PET/CT and CIS according to body region
| Lesion sites | PET/CT | CIS | ||
|---|---|---|---|---|
| False positive (n = 8) | False negative (n = 0) | False positive (n = 8) | False negative (n = 4) | |
| Abdominal lymph nodes | 3 | 0 | 3 | 0 |
| Lung | 1 | 0 | 1 | 1 |
| Local recurrence | 3 | 0 | 3 | 1 |
| Spleen | 1 | 0 | 1 | 0 |
| Metachronous tumor | 0 | 0 | 0 | 2 |
