sternocostal triangle of diaphragm (sternocostal foramen)

Introduction

A fibrous nonmuscular area of diaphragm between the muscular slips of the sternal & costal part.

• when fails to form congenitally, the morgagni foramen- may allow herniation of abdominal viscera into thorax

More general terms

• diaphragm muscle

Additional terms

• lumbocostal triangle of diaphragm (vertebrocostal trigone or triangle, Bochdalek gap)
• Morgagni foramen hernia (parasternal, retrosternal or foramen of Bochdalek hernia)