History A 38-year-old man who had been in a motor vehicle collision was referred to our institute. He was suspected of having left-sided pneumothorax. This necessitated intercostal drainage with a chest tube, which had been placed elsewhere prior to his arrival. Paraparesis was noted on the initial clinical examination, with adequately maintained vital signs, while the blood work-up revealed a mildly reduced hemoglobin level of 10.1 mg/dL (normal range, 13.8-17.2 mg/dL); however, the rest of the laboratory values were within normal limits (Figs 1-5). The patient was then immediately referred for further evaluation with CT of the brain, cervical spine, and thorax. Thereafter, serial chest radiography was performed for follow-up.