CTICasesTracheobronchopathia Osteochondroplastica (TBO)
Imaging findings
CT demonstrates multiple small calcified and non-calcified nodules projecting from the inner surface of the trachea, confined to the cartilaginous rings of the anterior and lateral walls with characteristic sparing of the posterior membranous wall. Bronchoscopy images confirm multiple small nodular hyperplastic projections confined to the cartilaginous tracheal rings, with a pristine posterior membranous trachea.
Key takeaways
Tracheobronchopathia osteochondroplastica (TBO) is a rare benign condition characterized by submucosal calcified or ossified nodules arising from the cartilaginous rings of the trachea and bronchi, with strict sparing of the posterior membranous trachea, which is the pathognomonic CT and bronchoscopic finding. It is usually an incidental finding but can rarely cause obstruction. The main differential is squamous cell papillomatosis, which does not spare the posterior wall.
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