SNHG20 and gastric cancer: The long non-coding RNA small nucleolar RNA host gene 20 (SNHG20) is located on 17q25.2, which has been reported to act as an oncogene in various tumors (Zhao et al. 2019), such as prostate cancer (Wu et al. 2019), gastric cancer (Yu et al. 2019), bladder cancer (Zhao et al. 2018), and lung cancer (Chen et al. 2017).