To optimally visualize a pleural effusion on neonatal chest radiographs, which view is most helpful?

To optimally visualize a pleural effusion on neonatal chest radiographs, which view is most helpful?

• A. Two right-angle radiographs
• B. PA and AP films
• C. A lateral decubitus film
• D. Lateral neck film

Answer: (C)

The key idea is that gravity helps pleural fluid layer when the patient is on their side. A lateral decubitus view places the newborn so the fluid can collect along the dependent lateral chest wall, producing a visible fluid layer and a meniscus between the lung and chest wall. This makes even small effusions detectable that might be occult on a standard frontal view. Other common views don’t routinely show this layering as clearly, and a lateral neck film isn’t relevant to pleural effusion. So the lateral decubitus film is the best option for optimally visualizing a pleural effusion in a neonate.

The key idea is that gravity helps pleural fluid layer when the patient is on their side. A lateral decubitus view places the newborn so the fluid can collect along the dependent lateral chest wall, producing a visible fluid layer and a meniscus between the lung and chest wall. This makes even small effusions detectable that might be occult on a standard frontal view. Other common views don’t routinely show this layering as clearly, and a lateral neck film isn’t relevant to pleural effusion. So the lateral decubitus film is the best option for optimally visualizing a pleural effusion in a neonate.