After blunt chest injuries, extrapleural hematoma may result in a collection of blood between the parietal pleura and the endothoracic fascia. Extrapleural hematoma is frequently misdiagnosed as hemothorax. Extrapleural fat sign, the inward displacement of strip of extrapleural fat on computed tomography, is typical radiological findings of extrapleural hematoma. We encountered a case of extrapleural hematoma with a presentation similar to hemothorax after blunt chest injury.
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