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  • Title: 'The broken halo sign': a fractured calcified ring as an unusual sign of traumatic rupture of the thoracic aorta.
    Author: Perchinsky MJ, Long WB, Urman S, Borzotta A.
    Journal: Injury; 1994 Dec; 25(10):649-52. PubMed ID: 7829186.
    Abstract:
    Two elderly patients, involved in separate motor vehicle accidents, sustained blunt chest injury resulting in rupture of their thoracic aortas. The initial chest radiographs showed the presence of a calcified ring fractured in two places with lateral displacement of a calcified fragment by haematoma. This 'broken halo sign' is a radiographic sign not previously well described in the literature. The presence of a disrupted aortic ring in the elderly patient, associated with the appropriate mechanism of injury, should alert the clinician to the potential diagnosis of traumatic rupture of the thoracic aorta (TRTA).
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