GI Radiology > Hernia > External > Morgagni

Morgagni Hernia

Morgagni hernias are the result of a developmental defect of the septum transversum, which creates small clefts within the diaphragmatic attachment to the sternum and costal cartilages. Loops of bowel and/or omentum can herniate retrosternally or parasternally through these clefts (Remember: Morgagni=Medial). Herniation occurs more frequently on the right side because the heart blocks protrusion on the left. Morgagni hernias are usually asymptomatic and only apparent when increased abdominal pressure (i.e. obesity) causes abdominal contents to herniate through the defect. If particularly large, the hernia can extend into the pericardial sac and is sometimes associated with a pericardial defect.


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