Morgagni hernias: an uncommon cause of chest masses in adults.

Morgagni hernia is a congenital diaphragmatic hernia that occurs secondary to potential anterior medial defects in the diaphragm. Although the hernia usually is diagnosed incidentally, appearing as a mass on chest radiograph, symptoms of bowel obstruction may occur. Surgical repair is required in all cases and may be performed with either the abdominal or transthoracic approach.