sternocostal triangle (of diaphragm)
fibrous (nonmuscular) area of diaphragm between the muscular slips of the sternal part of the diaphragm and the costal part; when it fails to form congenitally, the consequent foramen of Morgagni may allow herniation of abdominal viscera into the thorax.
Synonym(s): trigonum sternocostale diaphragmatisTA
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