hi my friend recently went in for a operation on polyps of the throat during the operation her throat swelled and she was given a cortisone injection and the doctors were unable to remove any of the polyps because of the swelling, she was told that she probably had a allergic reaction to the metal, she was then told that she would have to wait a further 3 to 4 months because if they tried again in a month and has another reaction she could go into allergic shock, i think now they are talking about using titanium metal but is there a test you can do before to see if you are allergic to that we are british living in greece and there is a slight language barrier also can polyps not be removed by laser thank you