Spontaneous Retropharyngeal Hematoma - Radiography of the neck revealed marked soft-tissue swelling that was causing mass effect on the airway (Panel A); the findings on a subsequent computed tomographic scan of the neck were consistent with a retropharyngeal hematoma, which was probably caused by supratherapeutic anticoagulation. #Clinical #Radiology #CervicalXRay #CTA #Retropharyngeal #Hematoma #NEJM