Table 1 Characteristics of the 52 patients with metastatic PTC
| Â | Number of patients | Number of deaths (%) |
|---|---|---|
Age (years) | Â | Â |
   > 19 | 7 (4F/3M) | 1 (1M) (14.3%) |
   19-45 | 10 (6F/4M) | 4 (3F/1M) (40.0%) |
   < 45 | 35 (19F/16M) | 16 (6F/10M) (45.7%) |
Sex | Â | Â |
   Males | 23 | 12 |
   Females | 29 | 9 |
Histology | Â | Â |
   Classic papillary | 24 |  |
   Follicular variant | 20 |  |
   Papillary with low differentiation of the cells | 6 |  |
   Insular | 1 |  |
   Columnar | 1 |  |
Size of tumor (mm) | 33 (7-80) | Â |
Multifocal tumors | 27 (15F/12M) | Â |
Bilateral tumors | 25 (13F/12M) | Â |
Invasion of tumor capsule | 4 | Â |
Absence of tumor capsule | 34 | Â |
Thyroid capsule invasion | 43 | Â |
Extrathyroidal invasion | 38 | Â |
Vascular infiltration | 17 | Â |
Presence of metastases | Â | Â |
   At diagnosis | 17 |  |
   During follow-up | 35 |  |
Years of follow-up (years) | 8 (1-29) | Â |
Thyroidectomy | Â | Â |
   TT | 46 |  |
   NTT | 6 |  |
Total RAI dose (mCi) | 360 (100-1500) | Â |
Thyroglobulin at 1 st RAI | 121 (1.9-4000) | Â |