Tracking tumor evolution via the prostate marker PSA: An individual post-operative study

The progress of the prostate-specific antigen after radical prostatectomy is observed for a patient in order to extract information on the growth mode of the tumor cells. An initial fast-growth mode goes over to a slower power-law regime within two years of surgery. We argue that such studies may help determine the appropriate time window for subsequent therapies in order to increase the life expectancy of the patient.