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<unk> . There is also small pleural effusion on the left side.<unk>  is the deviation of the<unk>  structures towards one side of the chest cavity, usually seen on chest radiograph. It indicates a severe asymmetry of intrathoracic pressures.<unk>  may be caused by volume expansion on one side of the thorax, volume loss on one side of the thorax,<unk>  masses and vertebral or chest wall abnormalities. An emergent condition classically presenting with<unk>  is tension pneumothorax.<unk>  may be detected on antenatal ultrasound in certain fetal conditions.
Mediastinal shift
Midline shift
Shifting dullness
Companion shadow
Radiodensity
Mediastinal lymphadenopathy
Diaphragmatic paradox
Left shift 