Sentinel Lymph Node Characteristics
| Location of SNs on SPECT/CT | No. of SNs per location | No. of SNs only on SPECT/CT | Additional value of SPECT/CT |
|---|---|---|---|
| Breast cancer patients | |||
| Axilla | 37 (49%) | 2* | More precise localization, but not always decisive for surgical approach |
| Internal mammary chain | 26 (35%) | 1 | Precise intercostal localization of all SNs, decisive for surgical approach |
| Supraclavicular region | 3 (4%) | — | Precise localization of all SNs, decisive for surgical approach |
| Infraclavicular region | 6 (8%) | — | Precise localization of all SNs, decisive for surgical approach |
| Interpectoral region | 3 (4%) | — | Precise localization of all SNs, decisive for surgical approach |
| Total | 75 (100%) | 3 | — |
| Melanoma patients | |||
| Axilla | 9 (33%) | 2 | More precise localization, but not always decisive for surgical approach |
| Supraclavicular region | 6 (22%) | — | Precise localization of all SNs, decisive for surgical approach |
| Scapular region | 4 (15%) | 1* | Precise localization of all SNs, decisive for surgical approach |
| Neck region | 4 (15%) | — | Precise localization of all SNs, decisive for surgical approach |
| Occipital region | 1 (4%) | — | Precise localization of all SNs, decisive for surgical approach |
| Auricular region | 3 (11%) | — | Precise localization of all SNs, decisive for surgical approach |
| Total | 27 (100%) | 3 | — |
↵* One axillary and 1 scapular sentinel node, visible only on SPECT/CT, were tumor-positive.
SN = sentinel node.