Small ubiquitin‐like modifier (SUMO) 1 pseudogene 3 (SUMO1P3) is a pseudogene and belongs to a separate class of lncRNAs.13 The up‐regulation of lncRNA SUMO1P3 has been observed in several human cancers, such as breast cancer,13 gastric cancer 14 and bladder cancer.15 In HCC, the study performed by Zhou et al16 demonstrated that the knockdown of SUMO1P3 could inhibit cell proliferation, colony formation and invasion abilities. Here, SUMO1P3 is linked to breast cancer.