EGFR and pachyonychia congenita: RT-PCR was performed to demonstrate the relative mRNA expression of B7-H3 and EGFR in Panc-1/NC, Panc-1/B7-H3+, Patu8988/NC, and Patu8988/B7-H3- cell lines to investigate the relationship between B7-H3 and apoptosis in PC cell lines.