The ultrasound tech said he saw nothing of concern - it looks like my lump is normal tissue. In a couple of days, the radiologist will look at the screen captures. So I'm reassured for now.
The cool thing is I got to see my elbow joint - actually both of them, since he was comparing them. Freaky.
The other bonus: that's my first ultrasound with an empty bladder!
PS: Now I'm having a holy sh*t, PTS comedown. You discover a lump - it happens just like that - and it's either okay or not okay. A friend of mine, just this weekend, lost one of her friends to cancer. I'm gonna go take a stress-tab, pack up my stuff, and ride home now.