Radiology Not a sign of Right atrial enlargement: A Prominent right heart border with increased convexity (PA view) B Prominent anterosuperior part of cardiac shadow (lateral view) C Obliteration of retrosternal clear space (Lateral view) D Haffman-Rigler Sign (Lateral view) 💡 Explanation Not a sign of Right atrial enlargement: ✓ Correct Answer: D. Haffman-Rigler Sign (Lateral view)