Patient, Tumor, and 18F-FDG PET/CT Scan Characteristics
| Characteristic | Data |
|---|---|
| No. of patients | 61 |
| Sex (n) | |
| Male | 44 (72%) |
| Female | 17 (28%) |
| Mean age (±SD) at the time of diagnosis (y) | 69 ± 13.0 (range, 25–93) |
| Site of primary disease (n) | |
| Cheek/chin | 5 (8.1%) |
| Ear/eyelid/nose | 4 (6.6%) |
| Forehead/scalp | 5 (8.1%) |
| Neck node | 2 (3.3%) |
| Axilla | 4 (6.6%) |
| Back/chest | 2 (3.3%) |
| Groin | 11 (18.0%) |
| Buttocks | 10 (16.3%) |
| Finger/hand | 2 (3.3%) |
| Forearm/elbow/arm | 8 (13.2%) |
| Knee/leg/thigh | 8 (13.2%) |
| Stage of primary disease at diagnosis (n) | |
| Stage IIIA (known primary) | 23 (37%) |
| Stage IIIA (unknown primary) | 20 (33%) |
| Stage IIIB | 18 (30%) |
| Prior treatment received (n) | |
| Surgery | 20 (33%) |
| Surgery + chemotherapy/ radiation/chemoradiation | 38 (62%) |
| Chemoradiation | 3 (5%) |
| Number of 18F-FDG PET/CT scans | 221 |
| Scans performed per patient (n) | |
| 1–4 | 43 |
| 5–10 | 18 |