Tracheobronchopathia osteochondroplastica (TO) is
a rare idiopathic disease with a stable course, which
involves the lumen of the tracheobronchial tree. The
pathogenesis of TO is still unclear and there is no
unified diagnostic and treatment protocol. TO is an
uncommon disease of unknown etiology,
characterized by the formation of multiple cartilaginous
or osseous submucosal nodules that grow into the
tracheobronchial lumen1