What are the causes for unilateral hypertransradiant hemithorax?
<br><b>Rotation</b> - poor technique, scoliosis <br> <b> Chest wall</b> - Mastectomy; polio; Poland syndrome <br> <b>Pleura</b> - pneumothorax <br> <b>Lung</b> - compensatory emphysema; airway obstruction; unilateral bullae, Swyer-James-syndrome; congenital lobar emphysema, bronchial atresia<br> <b>Pulmonary vessels</b> - PE<br><br> (From: Chapman &Nakielny - Aids to Radiological Differential Diagnosis, 5th Ed. Saunders 2009)
The heart size and contour are normal. There is hyperlucency of the left upper and mid zone without hyperexpansion or volume loss. Central branching opacity. No pneumothorax. No consolidation or pleural effusion. The right lung appears normal.