• 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.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• 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.
  NCI
  U.S. National Cancer Institute, 2021
• Weakness of the cartilage in the trachea and the bronchi, resulting in a floppy (non-rigid) airway. Affected persons may have difficulties to maintain patency of the airways.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• Tracheobronchomalacia (TBM) is a rare condition that occurs when the walls of the airway (specifically the trachea and bronchi) are weak. This can cause the airway to become narrow or collapse. There are two forms of TBM. One typically develops during infancy or early childhood (primary TBM). The other is an acquired form usually seen in...
  NIH Genetic and Rare Diseases
  National Center for Advancing Translational Sciences