@gill what is the weirdest thing you have seen in an ultrasound??

Question: @gill what is the weirdest thing you have seen in an ultrasound??
- Keywords:
  ultrasound
Asked by anon-210503 to Gill on 13 Mar 2019.
- Gill Harrison answered on 13 Mar 2019:
  
  This is a hard one to answer as the weirdest thing I saw was some bowel abnormality and I don’t think we every found out quite what it was.
  
  I have seen a worm in someone’s bowel on an x-ray.
  
  My colleague has seen a baby with a tail on ultrasound.

Question: @gill what is the weirdest thing you have seen in an ultrasound??