Here's my alternative view. I told my husband, my two teen daughters who live with me and my best friend. That's it. Work just knew I was having a surgical procedure (it was all they were entitled to know) as well as how long I thought I'd be out. When people ask, I tell them I eat a very high protein, low carb, low sugar diet; I work out 10-15 hours a week and log everything in My Fitness Pal. Every last bit of that is true.
I wouldn't tell people at work or elsewhere any of my other health issues/stories/resolutions, so I'm not sharing this one. My mother and sister don't know. I'm fine with that, but I'm very private about my health.
Everyone is different.