Peroperative γ-Probe Detection (In Vivo and Ex Vivo) and Characteristics of RGS-Target Lesions
| Probe-positive and resected (n = 29) | Probe-negative | ||
|---|---|---|---|
| Characteristic | Resected (n = 14) | Not resected* (n = 6) | |
| LoS of lesion on 18F-PSMA PET | |||
| 5 | 15 (52%) | 1 (7%) | 3 (50%) |
| 4 | 9 (31%) | 4 (29%) | 0 (0%) |
| 3 | 5 (17%) | 9 (64%) | 3 (50%) |
| Location on 18F-PSMA PET/CT | |||
| Obturator fossa | 13 (45%) | 2 (14%) | 0 (0%) |
| External iliac | 11 (38%) | 6 (43%) | 0 (0%) |
| Internal iliac | 3 (10%) | 1 (7%) | 5 (83%) |
| Common iliac | 0 (0%) | 5 (36%) | 0 (0%) |
| Pararectal and presacral | 2 (7%) | 0 (0%) | 1 (17%) |
| Histopathology | |||
| Number of LNMs | 28 (97%) | 2 (14%) | |
| Size (mm) | 7.9 (0.8–20.0) | 1.8 (0.6–3.0) | |
| Strong PSMA expression | 26 (93%) | 0 (0%) | |
| Moderate PSMA expression | 2 (7%) | 1 (50%) | |
| Mild PSMA expression | 0 (0%) | 1 (50%) | |
| No PSMA expression | 0 (0%) | 0 (0%) | |
↵* Still present and suggestive on postoperative 18F-PSMA PET/CT.
LoS = level of suspicion.
Qualitative data are number and percentage; continuous data are mean and range.