Abstract
Papillary thyroid carcinoma is considered to have a good prognosis. However, there are many cases with a poor prognosis, and extracapsular tumor invasion is known as one of the poor prognosis factors. Therefore, among the 187 cases of papillary thyroid carcinoma that were initially treated at our department, we examined 29 cases that were diagnosed as Ex2. The Ex2 cases had a significantly lower disease-free survival rate than the Ex0 and Ex1 cases. In addition, among the Ex2 cases, there was no recurrent nerve alone, but infiltration of surrounding organs other than the recurrent nerve had a poor prognosis. However, papillary thyroid carcinoma is a relatively prognostic disease, and there are cases where cancer-bearing long-term survival can be obtained. Therefore, it is considered important to treat such cases appropriately while aiming for functional preservation.
