BCR and posterior cortical atrophy: Furthermore, the separation between the BCR risk curve of the high KRT19 expression group and the low KRT19 expression group was greater (HR = 1459404193.89 [0 – Inf]; p = 0.059) in Gleason 6 and ERG fusion negative PCa patients (Figure 4D), suggesting the association between KRT19 expression and risk of BCR is influenced by ERG fusion status.