Figure 4.

Association of the expression of key long noncoding RNAs (lncRNAs) with clinicopathological features of papillary thyroid carcinoma (PTC). Note: Statistically significant differences in several key lncRNAs were notably associated with various clinicopathological features: tumor stage (T1/T2 vs. T3/T4), lymph node metastasis (no vs. yes), pathological stage (I/II vs. III/IV), smoking status (no smoking vs. current smoking), and targeted molecular therapy (no vs. yes). The X axis indicates the different lncRNAs, and the Y axis indicates the normalized expression (log2). The plots were conducted using the ggplot2 package of R language. *P < 0.05, **P < 0.01, ***P < 0.001