There are several ads on tv for low T treatments, Axiron I think is the latest. If I remember correctly, it cleary says it should not be used by men with PCa or at high risk for PCa. Check this out very carefully. Go on their website and look at the side effects and indications of the treatment.
I just checked and the Axiron website clearly states it is not to be used by men who have had or may have PCA. I would clearly question the doc on this.