label: tracheobronchopathia osteochondroplastica
label_lc: tracheobronchopathia osteochondroplastica
description: Tracheobronchopathia osteochondroplastica (TO) is an idiopathic and benign disease of the large airways characterized by submucosal osteocartilaginous nodules presenting in the trachea with or without the involvement of the major bronchi.