Table 2.
Characteristics of the 221 patients included in the study.
| Characteristic | N. (%) |
|---|---|
| Age, mean ± SD (range) | 66 ± 14 (16–88) |
| Sex | |
| Male | 72 (33%) |
| Female | 149 (67%) |
| Thyroid Lobe | |
| Right | 123 (56%) |
| Left | 87 (39%) |
| Isthmus | 11 (5%) |
| Ultrasound diameter (mm), mean ± SD (range) | 17 ± 12 (5–75) |
| Final Diagnosis | |
| Benign | 150 (68%) |
| Malign | 71 (32%) |
| Cytology (N. = 118) | |
| TIR2 | 35 (30%) |
| TIR3a | 24 (20%) |
| TIR3b | 30 (25%) |
| TIR4 | 13 (11%) |
| TIR5 | 16 (14%) |
| Histology (N. = 71) | |
| Anaplastic carcinoma | 3 (4%) |
| Follicular carcinoma | 7 (10%) |
| Papillary carcinoma | 61 (86%) |
| PET/CT Scanner | |
| Scanner 1 (Discovery 690) | 128 (58%) |
| Scanner 2 (Discovery STE) | 93 (42%) |
| Semiquantitative PET/CT parameters | |
| SUVmax, mean ± SD (range) | 7.9 ± 8 (1.3–56.7) |
| SUVmean, mean ± SD (range) | 4.3 ± 4 (1.0–37.1) |
| SUVlbm, mean ± SD (range) | 5.8 ± 6 (1.0–41.3) |
| SUVbsa, mean ± SD (range) | 2.0 ± 2 (0.4–12.6) |
| MTV, mean ± SD (range) | 9.2 ± 18 (0.4–198.0) |
| TLG, mean ± SD (range) | 35.0 ± 75 (1.9–722.4) |
N.: number, SD: standard deviation, mm: millimeters, SUVmax: standardized uptake value body weight max, SUVmean: standardized uptake value body mean, SUVlbm: standardized uptake value lean body mass, SUVbsa: standardized uptake value body surface area, MTV: metabolic tumor volume, TLG: total lesion glicolysis.