Mediastinal shift

Left tension pneumothorax seen as a large, well-demarcated area devoid of lung markings with tracheal deviation and movement of the heart away from the affected side (mediastinal shift). There is also small pleural effusion on the left side.

Mediastinal shift is the deviation of the mediastinal structures towards one side of the chest cavity, usually seen on chest radiograph. It may be caused by volume expansion on one side of the thorax, volume loss on one side of the thorax, mediastinal masses and vertebral or chest wall abnormalities. An emergent condition classically presenting with mediastinal shift is tension pneumothorax.

Mediastinal shift may be detected on antenatal ultrasound in certain fetal conditions.^[1]

References

↑ Colombani, M.; Rubesova, E.; Potier, A.; Quarello, E.; Barth, R.A.; Devred, P.; Petit, P.; Gorincour, G. (February 2011). "Conduite à tenir devant une déviation médiastinale fœtale : une approche pratique". Journal de Radiologie. 92 (2): 118–124. doi:10.1016/j.jradio.2010.12.002.

Radiologic signs
Cardiovascular	Aortic unfolding Dense artery sign Halo sign
Respiratory	Air crescent sign Deep sulcus sign Golden S sign Hampton hump Kerley lines Peribronchial cuffing Sail sign of the chest Silhouette sign Steeple sign Thumbprint sign Traction bronchiectasis Tree-in-bud sign Westermark sign
Urogenital	Canga's bead symptom
Musculoskeletal	Crescent sign Fabella sign Fat pad sign Osteopathia striata Sail sign of the elbow
Gastrointestinal	Cupola sign Double bubble Endoexoenteric Football sign Hampton's line Hot quadrate sign Mumoli's sign Omental cake Pneumatosis intestinalis Rigler's sign Sentinel loop
Neurological	Hot cross buns Hyperdense middle cerebral artery

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