Karma sounded a warning to my friend

A friend of mine who left school 40 years met me at the 40th anniversary of leaving our alma mater. Something related to karma had fallen him. He suffered from cancer of the nose and was cured finally. Usually cancer of the nose's chances of being cured is very slim. Hence in this case, karma must have sounded a warning to my friend. Since then, he repented and did good turns every now and then.