| Important Points |
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| l | Pleural
effusions are transudates or |
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| exudates |
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| l | It takes from
200-300cc to blunt the |
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| costophrenic
sulcus on the frontal view |
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| l | The meniscus
is the classic shape of an |
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| effusion on a
frontal film |
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| l | Pleural
effusions shift the mediastinal |
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| structures
away from the side opacified |
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