The 4-marker immunohistochemical score for PI3K activation is positively correlated with AR staining; (A) 4-marker immunohistochemical score of PI3K activation relative to AR staining; (B) 17-gene mRNA signature of AR flux score in low (−4 to −2) and high (2 to 4) immunohistochemical score cases showing no significant differences; and (C) heatmap of tertile of immunohistochemical staining four all four marker with corresponding annotation of (top to bottom) Ki67, TUNEL, age at diagnosis, lethal outcome, Gleason score, and the 4-marker score.