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MSH: A congenital or acquired condition of underdeveloped or degeneration of CARTILAGE in the TRACHEA and the BRONCHI. This results in a floppy non-rigid airway making patency difficult to maintain.,NCI: A rare congenital or acquired disorder characterized by excessive collapsibility of the trachea and major bronchi resulting in breathing problems. It is caused by damage to the tracheobronchial cartilage.
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