Ginkgo leaf sign.

The chest x-ray demonstrates several findings –

• Significant subcutaneous emphysema on the right with extension into the neck.
• Mid rib fractures on the right side with pleural based opacity (likely haematoma).
• A right sided pneumothorax.
• Pneumomediastinum on the left.

The radiological sign seen is the Ginkgo leaf sign – air outlining the fibers of pectoralis major muscle resembling a Ginkgo leaf.

Reference: https://radiopaedia.org/articles/ginkgo-leaf-sign-subcutaneous-emphysema