Molecular analysis revealed that the mean level of expression of GAS1 was significantly lower in the patients with a complete response compared to the patients with a partial response: 1874.83 ± 905.26 vs. 3901 ± 420.05, respectively (P = 0.014)....The baseline expression level of GAS1 appears to be predictive of the response of locally advanced BCC to systemic Vismodegib treatment.