What space is the mass located in?
What is the ddx for that space?
Aberrant Right Subclavian artery

• DDX: Aorthic Aneurysm, Goiter, Lymphadenopathy
• Occurs in .5% of population
• Right carotid arteries arises first with the right subclavian arising most distally in a retroesphogeal location
• Dysphagia lusoria – swallowing difficulties
• Diverticulum of Kommerell – dilatation of aberrant vessel at origin

 Superior mediastinal mass displacing trachea anteriorly, located in Raider’s Triangle

Raider’s Triangle

• The retrotracheal triangle is an area in the posterior superior mediastinum where abnormal structures may be detected in as many as 2% of chest radiographs. The authors describe the anatomy of this space and the abnormalities found therein, including vascular abnormalities (aberrant right subclavian artery, right aortic arch, double aortic arch, true and false aortic aneurysm), thoracic duct lesions, esophageal abnormalities (benign and malignant tumors, congenital atresia, duplication cysts, foreign bodies, diverticula, and achalasia), and miscellaneous entities (intrathoracic thyroid, bronchognic cyst, bronchogenic carcinoma, cystic hygroma, and emphysema). Careful attention to this long-neglected area on chest radiographs can yield findings of abnormalities not otherwise suspected

Dilated vessel passing posterior to the esophagus


Angio demonstrating aberrant vessel