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Pneumonia: Right middle lobe.
A, Anterior-posterior (AP) chest x-ray. B, Lateral chest x-ray. This 73-year-old male presented with cough with yellow sputum, fever 39.3°C, tachycardia, and oxygen saturation of 93% on room air. His chest x-ray shows a classic right middle lobe pneumonia. A, This opacity obscures the right heart border, which lies immediately adjacent. B, On the lateral x-ray, this appears as a more circumscribed density overlying the heart.
