It is totally understandable to be emotionally devastated by a cancer diagnosis - ALL OF US and our spouses were cut off at the knees by hearing the dreaded C word.
But your husband was under active surveillance specifically for this possibility. Surely that did not mean that he was immune to getting the disease, right?
In fact, BECAUSE he was on active surveillance, the cancer was spotted (one area), identified and will now be dealt with. Even biopsies can only give so much information so the intraductal area could be old news or a new tumor - impossible to know. His lifetime of doctor visits, blood tests and scans was ALREADY in progress during AS, so it will continue on this path unfortunately, and that’s something there’s just no getting away from.
A recent poster on this board, also a wife, describes her husband’s recent prostate cancer diagnosis which was FIRST discovered in almost every organ, his spine, pelvis, etc. He was not under AS. His prognosis is worse than your husband’s by magnitudes. His initial treatment will take YEARS in order to register actual improvement, whereas your husband’s may take one procedure (surgery or focal therapy) or a few weeks or months (radiation).
So please go back and thank your doctors for placing your man under AS so that you could be spared the abject terror that this poor woman and husband are facing.
You may not see it now - I know I surely did not - but you are a lucky couple and will live together for many happy years. You will look back and realize that this episode is a tiny bump in the road and not the brick wall you thought you were crashing into. Best
Phil