LDOC1 and thyroid gland papillary carcinoma: Previous studies have found that the LDOC1 expression is reduced in certain malignancies, including colorectal cancer (Jiang et al., 2019), cervical cancer (Chen and Wang, 2019), pancreatic cancer (Nagasaki et al., 2003), prostate cancer (Salemi et al., 2016), and papillary thyroid carcinoma (Zhao et al., 2015).