Anteroposterior chest X-ray and CT scan chest demonstrating the predictability of occult pneumothorax. AP chest X-ray revealing evidence of bilateral lung contusions and left subcutaneous emphesema (Panel A). Chest CT confirming both the lung contusions and the subcutaneous emphesema and demonstrating left sided pneumothorax not initially appearing on the anteroposterior chest X-ray (Panel B). Adapted from Omar et. al..