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Blunting of the right costophrenic recess, suggestive of a right-sided pleural effusion.
Normal left costophrenic recess.
From the case:
Pleural effusion
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Minimal right-sided pleural effusion.
Case Discussion
Pleural effusion on plain radiograph and ultrasound confirmation. Ultrasound is more sensitive to minimal pleural fluid, especially if <50 ml which could make no obvious changes on plain radiograph.