HAGLR and digestive system neoplasm: Among these tumor-related lncRNAs, HOXD cluster antisense RNA 1 (HOXD-AS1), also known as HOXD antisense growth-associated long non-coding RNA (HAGLR), has been affirmed to function as an oncogene in diverse digestive system tumors, such as gastric cancer [7], hepatocellular carcinoma [8], and colorectal carcinoma [9].