Tracheobronchopathia osteochondroplastica: a case report highlighting the importance of clinico-radiologic correlation.

Tracheobronchopathia osteochondroplastica (TBPO) is a rare and benign idiopathic disease of the tracheobronchial tree, characterized by osseous, and/or cartilaginous submucosal nodules involving the anterior and lateral walls of the airways with sparing of the posterior wall. We present a case of a 51-year-old non-smoker female, presenting with a 2-year history of gradually enlarging anterior neck mass with foreign body sensation, frequent throat clearing, and occasional hoarseness. She was initially diagnosed with recurrent respiratory papillomatosis due to the presence of nodules on flexible laryngoscopy. A plain neck and chest CT then showed irregularity of the tracheal walls with calcified nodules projecting into the lumen, sparing the posterior wall, consistent with TBPO. Fiberoptic bronchoscopy with biopsy was also done which confirmed the inferior extent of the nodules down to the level of the carina, and the presence of fragments of mature bone tissue within the nodules.