PCDH7 and lung adenocarcinoma: PCDH7 plays a role in many cancers, including lung adenocarcinoma (Ma et al., 2022) and gastric cancer (Xin et al., 2022), colon (Liu Z. et al., 2022), ovarian (Salgado-Albarran et al., 2022), and breast cancers (Zhang X. et al., 2022).