Asthma: There are several diseases or conditions that can cause hyper expansion but the most common is asthma.
Answered 10/4/2016
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Overaeration: Overaerated or enlarged lungs can be related to air trapping in chronic obstructive pulmonary disease COPD or chronic asthma. Emphysema either congenital or acquired can enlarge lungs.Smoking is linked to COPD.
Answered 11/19/2014
3.5k views
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