FIG. 2.

Univariate survival analysis comparing high- and low-grade patient among patients with calcitonin doubling time less than 2 years using log-rank tests. High-grade patients in this cohort were associated with worse LRFS (left panel) and OS (right panel) when compared with low-grade patients (p < 0.05 for both). DMFS (middle panel) among patients was not statistically different between high- and low-grade patients (p = 0.06). DMFS, distant metastasis-free survival; LRFS, locoregional relapse-free survival; OS, overall survival.