Answers
What does the chest radiograph show ?
There is collapse of the right lung.
The trachea is deviated to the right, there is complete opacification of the right hemithorax and loss of volume on the right.
What are the possible causes ?
Malignant and benign tumours (carcinoma, carcinoid, metastases, lipoma etc.), stenosis of the bronchus, mucous plug, aspiration.
What is the most likely diagnosis ?
The radiograph taken one day earlier is normal therefore the most likely diagnosis is aspiration. There has been aspiration of material (e.g. food, foreign body) into the right main bronchus causing collapse of the right lung.
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