"Left lower lobe collapse is readily identified on a well-penetrated radiograph of a patient with a normal sized heart but can be challenging in the typical patient with collapse, namely unwell patients, with portable (AP) often underpenetrated films, or with concomitant cardiomegaly. Features include 1-3:"
"The characteristic shape associated with volume loss usually does not allow for any significant differential diagnosis. As always one should consider:"
Expected headings
"Chest radiograph"
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