The rarest cancer on record did not begin in a human organ at all. It started inside a parasite, then crossed a biological ...

AMD is one of the rarest documented genetic disorders. Only around 10 million people in the world carry the altered NPR2 gene, and of those, just 3,500 are estimated to display the physiological ...

Here are the world’s rarest and most bewildering medical conditions, disorders that defy logic, challenge science, and ...

A child in Massachusetts missed Christmas due to her worsening flu symptoms in December Escher Walcott is a Writer/Reporter at PEOPLE, covering stories in Entertainment, Style, Human Interest. She ...