Aged 63 I was suddenly diagnosed for adult asthma as I was very shirt of breath but it turned out a year later I had ET! Jack2 positive! I have read this also causes shortness of breath. How can I know if I have asthma and not just ET symptoms! Would a spirometry test give the same result for ET? I now take a cortisone inhaler for asthma but is it asthma? I must ha e had the ET for a while as it was un noticed by my GP that my platelets were high so which is it and how do I find out?