Hernia through the foramen of Bochdalek is the most common type of congenital diaphragmatic
hernia, arises from posteriolateral portion of diaphragm, and the foramen is more frequently on left.
Embryologically, the foramen of Bochdalek hernia represents defects of various sizes in the posteriola
teral area of the diaphragm due to incomplete fusion of pleuroperitoneal membrane. The herniated
viscera then usually includes stomach, small bowel, colon, spleen and occasionally pancreas and kidney.
The mortality rate rises concomitantly with delay in surgical intervention and complicate the conge
nital anomalies, in spite of reinfinements in surgical techniques developed with recent decades.
Now 2 cases of Bochdalek hernia, arised from posteriolateral and posteriomedial portion of left diaph
ragm, reports here, and reviewed literatures on embryology, symptoms, diagnosis and treatment which
experienced in St. Mary´s hospital, Seoul.
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