The obliteration of which of the following structures is most suggestive of an anterior mediastinal mass.
Correct Answer:
Hilum overlay sign
Widened paratracheal stripe | |
Lateral doughnut sign | |
AP window mass | |
Hilum overlay sign | |
Widened paravertebral stripe |
The hilum overlay sign occurs when a mass arises in the anterior mediastinum and the hilar vessels are seen through the mass, meaning that the mass does NOT arise from the hilum. Due to the anatomy of the mediastinum most of these masses will lie in the anterior mediastinum. Widened paratracheal stripe, Lateral doughnut sign and AP window mass are seen with middle mediastinal masses. Widened paravertebral stripe is seen in posterior mediastinal masses.