Overexpression of PTENP1 was reported to decrease proliferation, colony formation, and migration in the breast cancer cell line MCF7 (Chen et al., 2017; Gao et al., 2019; Shi et al., 2018), while Yndestad et al., 2018 reported decreased PTEN mRNA expression and accelerated MCF7 tumor growth. The gene discussed is PTEN; the disease is neoplasm.