NAF1 Mutation (IMAGE) Johns Hopkins Medicine Caption A CAT scan shows air space destruction -- a hallmark of emphysema -- in the lungs of a patient carrying an NAF1 mutation. Credit Mary Armanios, Johns Hopkins Medicine Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.