my husband, has a chronic cough and keeps on coughing some days it is worse then others it has been going on for about 6 months and they are finally sending him to a pulmoglist which is great they found nodgiles cant spell it right in his lungs how serious is that? can it lead to cancer of the lungs? they also found that his thyroid was enlarged on the ct scan how can a ct scan pick up things and the x ray cant.