Abstract
Papillary thyroid carcinoma (PTC) is among the most curable cancer types. Even though uncommon, some patients present distant metastatic disease at diagnosis or during the follow-up and most of them have long-term survival. However, there continues to be controversies regarding what clinicopathological features are associated with mortality in these patients. This paper evaluates the factors related to poor disease-specific survival (DSS) in patients with metastatic PTC. A retrospective cohort study included PTC patients with distant metastasis from a tertiary public oncological center. Clinicopathological features, treatment modalities, and outcome were reviewed. Between 1986 and 2014, 108 patients were diagnosed with metastatic PTC. In the multivariate analysis male sex (HR = 2.65; 95%CI: 1.08-6.53; P = 0.033), radioiodine refractory disease (HR = 9.50; 95%CI: 1.23-73.38; P = 0.031) and metastasis at multiple sites (HR = 5.91; 95%CI: 1.80-19.32; P = 0.003) were independent risk factors for death in patients with metastatic PTC. Male patients with metastatic PTC, with radioiodine refractory disease and metastasis at multiple sites have a high risk of death.
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