PCDH7 and lung cancer: In cervical cancer, PCDH7 expression was associated with lymph node metastasis and cell differentiation, and upregulation of PCDH7 significantly inhibited the proliferative capacity, migratory potential and invasive ability of cancer cells [13], whereas, in lung cancer, PCDH7 was used as a risk gene for poor prognosis [14], suggesting that PCDH7 plays different roles in different cancer types.