TP53BP1 and posterior cortical atrophy: Analysis of the abiraterone acetate-induced radiosensitization enhancement ratio (AbiER) revealed that tumor samples from 13 out of 15 PCa patients (67%) showed at least a 2-fold increase in their AbiER index, with minor alterations between both γH2AX (Figure 8a) and 53BP1 (Figure 8b) markers.