Intercostal lung hernia: radiographic and MDCT findings.

Lung hernia, defined as protrusion of pulmonary tissue beyond the normal confines of the thoracic cage, is an unusual clinical entity. We describe radiographic and MDCT findings in a series of six cases. The diagnostic sign of intercostal lung hernia apparent on a chest radiograph and cross-sectional imaging is the detection of lung parenchyma or intra-thoracic contents beyond the rib cage. Multidetector computed tomography (MDCT) allows a detailed study of the underlying anatomy and is helpful in planning further management.