Best wishes to you! Unfortunately, if they found cancer cells in your seminal vesicle(s), it's not considered "prostate is confined." If the cancer cells are confined within the prostate gland, meaning that they have not broken the prostate capsule, then the doctors use the term "localize" (stage 1-2) However, if the cancer cells broke the capsule to nearby tissues, such as seminal vesicle(s), the doctors use the term "locally advance" (stage 3-4)

I know about this from my husband's PC doctor team. My husband has seminal vesicle invasion on the right side, which was found during his surgery in 2021. So, his stage was upgraded from localize (2) to locally advance(3Tb to be exact). To make sure that you understand, any scans, including PSMA scan, can miss microscopic cells that are very small. It explained a lot in my husband's case. the cancer cells in his right seminal vesicle was less than 2 mm.