Imaging Case of the Week 71

The following chest x-rays are from a neonate with respiratory distress. What condition and interesting radiological sign can you observe?

supine chest x-ray

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chest x-ray lateral

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[peekaboo_link name=”Answer”]Answer[/peekaboo_link] [peekaboo_content name=”Answer”]


The chest x-rays show the spinnaker sign which is a radiological finding in neonatal pneumomediastinum.

Spinnaker Sign

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Also referred to as the thymic wing sign, it indicates lobes of the thymus displaced laterally by the mediastinal air, resembling the headsails of a boat.

This neonate was managed conservatively by the specialist and responded well.