PCDH20 and esophageal cancer: Because PCDH20 had a significant inhibitory effect on the proliferation of esophageal carcinoma cells, we assessed effects on the apoptosis and cell cycle by utilizing flow cytometry, PCDH20 overexpression resulted in G1 phase cellular accumulation (Figures 4A, B) and increased esophageal cancer cells apoptosis (Figures 4C, D).