Rare Medical Conditions
Most people won't have even heard of some of the conditions in this section, but the rare few who have them live with their extreme effects every day.
Here are 10 weird and highly specific brain conditions, and what they each show us about the human brain.
Fetus in fetu (or Foetus in foetu) describes an extremely rare abnormality that involves a fetus getting trapped inside of its twin.
Hyperdontia is a condition where a person grows too many teeth.