article_snippet: Scientists believe the illnesses are caused by the same faulty gene passed down through families.
article_snippet: Although doctors have been aware the illnesses run in families for several years, this research shows the faulty gene may be more important than the faulty gene previously thought.
article_snippet: Those with a first degree male relative – brother, father or son – were 14 per cent more likely to have developed the illness.
article_snippet: Those with a first degree male relative – brother, father or son – were 14 per cent more likely to have developed the illness .
article_snippet: Families with clustering of different tumors may be particularly important to study in order to discover new genetic mutations to explain this clustering.'
highlights_snippet: Scientists believe illnesses caused by same gene passed down families .
  