Hi, Thanks for writing in. Cancer is a challenging condition and prostate cancer that has spread to bones and liver is difficult to treat completely. It is important to know that the liver lesions can be targeted and treated with new treatments like chemoembolizaton and radio frequency ablation. There are certain criteria to be fulfilled before treatment is given. Chemotherapy also is a good treatment option but radiofrequency ablation and chemoembolization are more target oriented treatments from a closer distance and therefore the success rates are higher. Unfortunately your father might be having stage 4 cancer of the prostate. This requires aggressive treatment and if his bone lesions have responded to treatment in the past then it ids good and there are chances that the disease process can be controlled and stabilized. Pain is due to pinching and irritation of nerves in the lower back due to the spread of disease to the bones. Instead of giving him a regular morphine, it is better to give him morphine when the pain is severe. This way he will not develop tolerance to the medicine and can get pain free. Please do not worry.