What was the most interesting/surprising thing you found when analysing a patient’s brain?

Question: What was the most interesting/surprising thing you found when analysing a patient's brain?
- Keywords:
  brain,
  interest,
  surprising
Asked by 495cara47 to Sarah on 24 Jan 2018.
- Sarah Finnegan answered on 24 Jan 2018:
  
  Once I found a big black hole near the top of the brain! It was quite a surprise! But actually it was caused by a small piece of metal that they had in their forehead. The metal actually prevents us from getting information from that area and so it just shows up as a black area on the scan pictures.

Question: What was the most interesting/surprising thing you found when analysing a patient's brain?