“…Retropharyngeal hematoma is characterized by the clinical triad of tracheal and esophageal compression, ventral tracheal displacement, and the subsequent appearance of subcutaneous bruising in the anterior neck and upper thorax. 1,2 Etiologies of retropharyngeal hematoma include infection, [3][4][5][6] cervical spine trauma, 2 , 7 -1 1 great vessel trauma, 9,12 violent head movements, 2,13 iatrogenic injury associated with cardiac catheterization 12,14 and cerebral angiography, 15,16 parathyroid adenoma hemorrhage, 1,[17][18][19] and foreignbody ingestion. 20 Anticoagulation 7,[21][22][23][24][25][26][27][28][29][30] or a hemorrhagic diathesis 31 predispose to the development of retropharyngeal hematoma.…”