My dad got a regular PSA test from his old doctor. But that doctor retired, he got a new doctor, moved, got a new doctor again, and the guidance changed, recomm

My dad got a regular PSA test from his old doctor. But that doctor retired, he got a new doctor, moved, got a new doctor again, and the guidance changed, recommending against annual PSA tests. Then my dad developed some back pain. Took it easy, went to the doc, did physical therapy, etc., but it just got worse. Turns out, he had (has) stage IV prostate cancer, with several tumors along his spine and was on the precipice of MSSC before he received a correct diagnosis at age 66. His PSA was north of 80. The good news is that treatment has shrunk the tumors dramatically and he's mostly back to normal. The bad news is that he still has stage IV prostate cancer. It'd have been great to have had it caught earlier.