I've read lots of stories about getting caught out while underdressing. Today was my turn I guess. I had an appointment for an ultrasound to check out some swelling that I have been having in my ankle. The doctor was concerned about blood clots. I showered and dressed in my usual shorts and a T-shirt with my usual Wacoal panties. I never in a million years thought that I would need to undress. Well, guess what. The nurse doing the ultrasound said that she would need to check the veins from my groin all the way to my foot. She asked me to remove my shorts but leave my underwear on. She handed me a sheet to cover up with. I laid down on the table and she began her ultrasound check. She had to move my panties out of the way in order to do the ultrasound. She didn't blink an eye or react in any way. Which is what I would expect. Oddly enough I wasn't the least embarrassed or really concerned. As many others have reported, it was really no big deal. Once again, I have confirmed what so many others already know.