article_snippet.sent: a man's  had suffered a condition called arteriovenous malformation for the past 20 years.
article_snippet.sent: This is a tangle of blood vessels in the brain which diverts blood from the arteries to the veins, bypassing normal brain tissue.
article_snippet.sent: In a man's 's case, this man's case caused facial deformities and problems with a man's  vision and speech.
article_snippet.sent: There was, however, a risk of severe bleeding that put a man's  life in danger.
highlights_snippet.sent: a man's  had  facial deformities, speech and vision problems and risk of bleeding .
  