Table 2. The list of piRNAs significantly upregulated in tumor tissue of papillary thyroid carcinoma compared to normal tissue by next-generation sequencing.

Up-regulated piRNA	Fold change	FDR
piR-hsa-31830	4.409006161	5.77E-05
piR-hsa-13643	7.228884305	0.000239
piR-hsa-26131	5.03247354	0.000455
piR-hsa-12519	16.39352629	0.00082
piR-hsa-21238	6.841397067	0.000849

Abbreviation: PIWI-interacting RNAs (piRNAs); Fold Change (FC).