These plots show the linear relationship between median PSA-Nadir and median Testosterone-Nadir, pointing towards the Origin (i.e., 0 PSA-Nadir at 0 T-Nadir.). N= 38 men. The upper to graphs compare median PSA-nadir and median T-Nadir for Non-CRPC and CPRC groups (CPRC = Castrate Resistant Prostate Cancer).
Non-CRPC men have roughly about 1/2 the median PSA-Nadir and 1/2 the median T-nadir values compared to CRPC men, which makes sense because non-CRPC men are still hormone sensitive to ADT and, hence, have lower amounts of prostate cancer in their bodies.
PSA 4.7 51yr old RP vs RT
Relevance of Testosterone Levels
Recovery of Testosterone 
Another disappointing PSA
