CTICasesExtrapleural Hematoma and Hemothorax with Multiple Fat Stripe Signs
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Imaging findings
Chest radiograph shows evidence of chest wall injury, fractures, extrapleural hematoma, and possibly contusion. CT reveals multiple rib fractures, hemothorax, and areas of extrapleural hematoma demonstrated by the "fat stripe sign," where extrapleural fat is lifted off the chest wall by superficial blood. Findings of ankylosing spondylitis are noted in the spine.
Key takeaways
The "fat stripe sign" on CT is a useful indicator for distinguishing extrapleural hematoma from hemothorax in trauma patients, as it represents displaced extrapleural fat superficial to the pleural collection. Severe chest wall injury can occur with minimal trauma in patients with ankylosing spondylitis.
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