Giant morgagni hernia causing cardiac tamponade.

A 57-year-old man presented with worsening symptoms of shortness of breath and chest pain. He was found to have a giant Morgagni hernia with severe compression of his right ventricle on computed tomography scan. The hernia which contained greater omentum, small intestine and transverse colon was urgently repaired through a median sternotomy and laparotomy with a polypropylene mesh. Morgagni hernia is a type of congenital diaphragmatic hernia, which may not be symptomatic until adulthood. Presentation with this degree of right ventricular compression is rare.