Figure 2

PSA response. Waterfall plots depicting best PSA responses in patients starting ARTA treatment according to CTC status, (A, left panel) CTC − patients, (A, right panel) CTC + patients, and AR-V7 status, (B, left panel) AR-V7- patients, (B, right panel) AR-V7 + patients. The dotted line illustrates the threshold of PSA 50% decline defining a PSA response. When comparing patients concerning CTC status, PSA response rates were 8/11 (72.7%) and 23/54 (42.6%) in CTC − and CTC + patients, respectively, without statistical significance (p = 0.10; Fisher’s exact test). PSA response rates were 20/32 (62.5%) and 11/33 (33.3%) in AR-V7- and AR-V7 + patients, respectively (p = 0.03; Fisher’s exact test).