Characteristic | FDG-PET-positive n = 22 | FDG-PET- negative n = 17 | P value |
---|---|---|---|
Mean age years ± SD* | 51 (±21) | 44+/−21 | 0.03 |
Gender male:female | 10:12 | 6:11 | n.s. |
Initial TNM stage | Â | Â | 0.01 |
Stage 1 | 4 | 9 | Â |
Stage 2 | 0 | 1 | Â |
Stage 3 | 10 | 1 | Â |
Stage 4 | 4 | 3 | Â |
Unknown | 4 | 3 | Â |
Mean tumor size (mm) ± SD | 33 ± 22 | 24 (±13) | n.s. |
Extrathyroidal extension of the tumor at diagnosis (yes/no) | 8 (38%) | 7 (44%) | n.s. |
Lymph node metastases at diagnosis (yes/no), n (%) | 15 (71%) | 11 (68%) | n.s. |
Median thyroglobulin level at recurrence μg/L (range) | 32.9 (0.9#-1500) | 3.1 (0.3#-300) | 0.024 |