Pathological change | Less than 4 years after the accident | 4 years or more after the accident | Total | |||
---|---|---|---|---|---|---|
Number of cases | Percentage | Number of cases | Percentage | Number of cases | Percentage | |
All papillary carcinomas cases | 78 | 67.8% a | 37 | 32.2% a | 115 | 100% a |
Intrathyroidal spread | 36 | 46.2% b | 20 | 54.1% c | 56 | 48.7% a |
Extrathyroidal extension | 34 | 43.6% b | 14 | 37.8% c | 48 | 42.1% a |
Lymphatic/vascular invasion | 56 | 71.8% b | 28 | 75.7% c | 84 | 73.0% a |
Lymph node metastasis | 61 | 78.2% b | 31 | 83.8% c | 92 | 80.0% a |
Distant metastasis | 3 | 3.8% b | 0 | 0.0% c | 3 | 2.6% a |