Hi. My father has 54 years old. In October of 2009 he was diagnostic with Advanced Prostate Cancer with various bone metastases. He was put in hormone therapy. His PSA low a bit, but in April this year, the cancer spread to the spine, and the bone pain was getting bigger. After that he was put in radiotherapy (20 sessions) that have some good results but he still cannot walk. He has been in chemotherapy since then (4 sessions), this treatment, in other hand, has no effect, his PSA has been about 175 with not much of a change.My question is, what can I expect? Many years of life? Witch symptoms can be shown from here?