When I had my band I told just a few people, but it didn't really matter as I was in a redundancy situation at the time. But now that I've had a bypass I haven't told anyone more than knew about my band. The problem I have is everyone at work knows that i have had surgery twice now (band removal then bypass), i'm not sure how to explain the weightloss, I get the feeling at some point i'm going to have to come clean.
My view is that its my life, if someone had an abortion/miscarriage would they feel they had to tell everyone? I don't. However, my OH is of the opinion of truth is the best policy and cos of that I find it very difficult to hide things and every time I evade questions i feel soo guilty..which is crazy!!
But, I do think the choice has to be yours and only yours. Work can't make you tell them what you are having done, and the hospital is always discreet...good luck!!