Patients’ SN Details and Surgical Impact
| No. of patients (%) with… | Breast cancer (n = 1,182) | Melanoma (n = 262) | Pelvic cancer (n = 64) |
| SN found | 1,080 (91.4) | 260 (99.2) | 61 (95.3) |
| No SN found | 102 (8.6) | 2 (0.8) | 3 (4.7) |
| Planar detection rate* | 1,036 (87.6) | 259 (98.8) | 56 (87.5) |
| SPECT/CT detection rate* | 1,080 (91.4) | 260 (99.2) | 61 (95.3) |
| At least 1 SN found with SPECT/CT but none with planar | 44 (3.7) | 1 (0.4) | 5 (7.8) |
| Equal SNs with planar and SPECT/CT | 929 (78.6) | 199 (75.9) | 29 (45.3) |
| More SNs with planar than SPECT/CT† | 21 (1.8) | 10 (3.8) | 0 |
| More SNs with SPECT/CT than planar | 232 (19.6) | 53 (20.2) | All, 35 (54.6) |
| Prostate, 33 (82.5) | |||
| Cervix, 1 (6.6) | |||
| Penis, 1 (14.2) | |||
| Vulva, 0 | |||
| No drainage basin mismatch | 987 (83.5) | 233 (88.9) | 31 (48.4) |
| Drainage basin mismatch | 195 (16.5) | 29 (11.1) | 33 (51.6) |
| At least 1 SN positive for metastasis | 366 (31) | 34 (13) | 16 (25) |
| At least 1 SN positive for metastasis planar | 328 (29.7) | 34 (13) | 13 (20.3) |
| At least 1 SN positive for metastasis SPECT/CT | 366 (31) | 33 (12.6) | 16 (25) |
| At least 1 SN positive for metastasis planar but not SPECT/CT | 0 | 0 | 0 |
| At least 1 SN positive for metastasis SPECT/CT but not planar | 38 (3.2) | 2 (0.8) | 2 (3.1) |
| Surgical adjustment‡ | 200 (17) | 97 (37) | 42 (65.6) |
| Without changes in management if only SPECT/CT performed | 0 | 0 | 0 |