First off, I made this account for my dad but I am his daughter typing this. I am confused and looking to see if anyone had the same thing happen. Quick background...DX 2.5 years ago PSA 15 Stage 4 Gleason 8, all cores. He got radiation on his prostate and pelvic bone. Put on Lupron and Zytiga and Prednisone. Been doing very well. PSA has remained .01. Last bone scan 6 months ago, no spots. This past month, several spots on ribs and area on L3 lumbar spine. He has had fractures on the past on his ribs even prior to cancer. The oncologist called him in to tell him that he met with several other doctors because they are stumped. They are shocked his PSA is .01 but there are possible bone mets. They sent him for a cat scan on chest and mri on lumbar spine. There were some spots on the ribs and a spot on L3. The radiologist calls them unknown and suspicious for cancer. His next step is a biopsy on lumbar spine. His oncologist said that if it is cancer, it is some type of undifferentiated cancer. So, not prostate cancer, but some other type of cancer? I thought I understood what he meant but now I'm not sure. Has anyone with a low PSA like this, years into treatment got mets with a .01 PSA and if so was it prostate cancer, or some other type of cancer? Doctor told him he would have to start chemo immediately if so. Made it sound very rare and some type of "haywire" cancer. He told me that he is going to be realistic with his options
TLDR:Anyone end up with a different cancer years into treatment with a PSA of .01 or similar? Was it prostate cancer still, or some other type of cancer?