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. The gene discussed is PCDH7; the disease is lung carcinoma.