A lesion with sharp outlines extending above the clavicles suggests?
Correct Answer: Posterior mediastinal lesion
Description: Ans BThe anterior mediastinum ends below the clavicle while the apical lobes of upper lung lobes extend superior to the clavicles more posteriorly hence if a mass lies in the posterior mediastinum its margins would be lined by air filled lungs and hence seen as sharp margins. This is an extension of the Silhouette sign - the Cervico-thoracic sign.
Category:
Radiology
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