It is true that scar tissue can be caused by pulmonary fibrosis but scar tissue can come from many things. You can have bronchitus or pneumonia and end up with scar tissue on your lungs. Here is a good site for you to research information on:
http://www.medlineplus.com/encyclopedia
Search under scar tissue then click on show all health topics and it will give you a list of all the illnesses that can allow scar tissue to build-up besides pulmonary fibrosis.
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*Cheryl K* Please click the "ACCEPT" button
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