The appearance of lucent tubes traversing a region of lung consolidation is known as a(n) __________ sign.

Question

Quizplus · Accepted Answer

The appearance of lucent tubes (air-filled bronchi) in an area of lung consolidation is known as an air bronchogram sign. This occurs when the bronchial walls become more prominent due to surrounding consolidation or fluid. Option B, air crescent sign, refers to the appearance of a crescent-shaped pocket of air around a space-occupying lesion. Extrapleural sign (C) refers to the appearance of extrapleural fat pads, while figure 3 sign (D) refers to the appearance of a reversed "3" shape in the trachea or bronchi, indicating airway obstruction.

The Appearance of Lucent Tubes Traversing a Region of Lung