MYH9 and breast cancer: Li et al. found that circ‐EIF6 expression was increased in breast cancer tissues and that its encoded protein EIF6‐224aa inhibited its ubiquitin‐dependent degradation by interacting with the oncogene MYH9, thereby activating the MYH9/Wnt/β‐catenin pathway and ultimately promoting the proliferation and metastasis of triple‐negative breast cancer cells.46