However induced, a ‘simple’ transfer of Cav1 from stromal fibroblasts to the epithelial cells might not be the only mechanism resulting in epithelial Cav1 (re) expressions as Cav1(−) fibroblasts in vivo or as supernatants derived from these cells in vitro foster radiation resistance of the PCa cells used here. Here, CAV1 is linked to posterior cortical atrophy.