From your description it is hard to tell where the soft tumor was.
If the ultrasound
was normal , I take it that the gallbladder
, kidneys all looked normal.
If they found a cyst in the abdominal wall , they may be trying to
aspirate it with fine needle to get some fluid and send it for analysis.
I suspect that is the case. It might be a benign cyst
of the abdominal
wall. I agree that you followthrough with your surgeon and have that
procedure done. I don't expect anything serious.
I wish her well.