Which is the most appropriate next step in diagnosis for the summer patient with worsening congestion and cough and diminished lung sounds due to body habitus?

• A. Lung Ultrasound
• B. Sputum culture
• C. Chest X-Ray
• D. CT Chest

Answer: (C)

When body habitus makes it hard to rely on listening for clues, you want a test that quickly and reliably shows what’s happening inside the chest. A chest X-ray provides a broad view of the lungs and heart, making it the best next step to identify pneumonia, atelectasis, edema, or pleural effusions that could explain worsening congestion and cough. It helps guide management right away and is more accessible, faster, and involves less radiation than a CT when you’re evaluating acute respiratory symptoms. Lung ultrasound can help detect pleural effusions or pneumothorax, but it’s more limited in providing a complete chest overview and can be affected by body habitus. Sputum culture takes time and doesn’t diagnose the acute process radiographically, and CT chest, while more sensitive, is usually reserved for cases where the X-ray is nondiagnostic or complications are suspected. A chest X-ray thus offers the most efficient, informative next step.