“…13,[19][20][21][22] In addition, some cases suggest that events such as mechanical, chemical, infectious aggressions, and cancer directed toward cartilaginous structures may precipitate the onset of RPC in genetically susceptible patients. 12,13,17,[19][20][21][22][23] The cellular response appears to be mediated by cytokines invasive maneuvers with ventilatory support and extensive medication as in our case and other studies described. [1][2][3]25,26,28,29 Chest radiography may reveal tracheal narrowing, consolidations, or atelectasis that are induced by airway obstruction, pulmonary edema, and calcification of tracheal or laryngeal cartilage.…”