My husband had radical prostatectomy for cancer 11 years ago. Over 5 years later the cancer returned to the bed of where prostate had been and he had intense targeted radiotherapy treatment and psa retuned to 0. Recently his psa started rising again and after several tests including Ct scan, MRI and pet scan it is confirmed the cancer has spread to abdomen in lymph nodes. He can’t tolerate hormone therapy so can’t have chemo. I’m so scared and he only told me after he received 4 hospital letters in the same day. Is this stage 4?