PMC5578814_01
Longitudinal ultrasonic image showing the transverse fracture of the manubrium sterni with dorsal displacement of the distal fragment by 0.97 cm.
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Ultrasonic imaging revealed a transverse fracture of the manubrium sterni with dorsal displacement of the distal fragment by 0.97 cm ( Fig. 1 ) in the absence of pericardial effusion.
T2-weighted sagittal MRI showing the fracture (indicated by arrow) of the sternum. MRI, magnetic resonance imaging.
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The displaced sternal fracture without combined intrathoracic injuries was confirmed by MRI ( Fig. 2 ).
PMC5578814_02
Lateral chest X-ray without signs of fracture.
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In the lateral chest view, no subtle fracture line or displacement was demonstrated ( Fig. 3 ).
Transverse ultrasonic image showing the transverse, nondisplaced fracture of the corpus sterni (indicated by arrow).
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Ultrasonic imaging identified a transverse fracture of the middle part of the sternum without displacement or pericardial effusion ( Fig. 4 ). 
Longitudinal ultrasonic image obtained 9 months after injury showing consolidation of the fracture and sufficient remodelling of the anterior outline of the sternum.
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Sonographic follow-up after 9 months demonstrated consolidation of the fracture and sufficient remodelling of the sternum in both children ( Fig. 5 ). 