article_snippet.sent: Billy Mitchell, now seven, was born with Apert syndrome, a rare condition which left A little boy with malformations of the skull, face, hands and feet.
article_snippet.sent: Billy Mitchell, seven, was born with Apert syndrome, a rare genetic condition which causes malformations .
highlights_snippet.sent: Billy Mitchell was born with Apert syndrome - a rare condition that causes malformations to the skull, face, hands and feet .
  