A. Pleural Effusion
B. Lung Collapse
D. Pulmonary Tuberculosis
Ans:B. Lung Collapse.
- The ‘Golden S sign’ – collapse of the right upper lobe with a well demarcated lateral border formed by the elevated horizontal fissure (arrows), and a focal convex bulge at the apex due to the centrally located bronchogenic carcinoma.
- The lack of air within collapsed right upper lobe accounts for the increase in radiographic density.
- The well-demarcated lateral border represents the elevated horizontal fissure.
- The focal bulge at the apex of the collapsed right upper lobe corresponds to the centrally located bronchogenic carcinoma causing the lobar collapse. The combined radiologic appearance on frontal radiograph is known as ‘Golden S sign’.
- The hyperinflation and elevated right hemidiaphragm are due to volume loss.
- Other radiologic features of right upper lobe collapse not seen on this chest radiograph include:
- Crowding of ribs in right upper chest wall – due to underlying lung volume loss
- Tracheal deviation to the right – due to traction from the collapsed lung