What is the craziest mutation you have found in a child?

Question: What is the craziest mutation you have found in a child?
- Keywords:
  child,
  craziest,
  mutation
Asked by AlexTheQuan to Gaia on 9 Mar 2016.
- Gaia Andreoletti answered on 9 Mar 2016:
  
  I found a mutation that caused the protein produced by the mutated gene to be not properly placed in the cell. Nothing crazy which might confer genetically altered superheroes like X-Men 🙂

Question: What is the craziest mutation you have found in a child?