My father in low has cancer prostate, on diagnosis his psa was 17 ng/ml, he recieved hormonal treatment now psa is 0.3 ng/ml , wht is that mean?

In addition to hormo: Besides hormonal treatment, he will likely need local radiotherapy to the prostate gland. He should seek a second opinion from a radiotherapist just to be sure that he is receiving adequate treatment for his prostate cancer.

Improvng with thera: The hormonal therapy has been effective in slowing down the prostate tumor which produces excess psa.