An Analytical Study of Prostate-Specific Antigen Dynamics

Figure 1

PSA versus age for prostate cancer patients stage T2a (purple) and T2b (brown). Each curve is associated with an initial tumor volume. It begins at 0.5 cm³ (T2a) or 4.5 cm³ (T2b) increasing 0.5 cm³ bottom up to reach a maximum tumor volume of 4.0 cm³ (T2a) or 10.0 cm³ (T2b). The red line shows the PSA standard cut-off value (4 ng/mL).