RADIOLOGY: CHEST: Case# 16: BOCHDALEK HERNIA. 25 year old female with history of SLE and three week history of epigastric pain radiating through to the back. The left kidney and splenic flexure lie in the posteroinferior aspect of the chest. Bochdalek hernias are the most common type of diaphragmatic hernias found in infants and have been found to occur in as much as 5% of the general population. Bochdalek hernias are formed when a portion of the muscle of a hemidiaphragm becomes exceedingly thin or is absent. Although more common on the left side they may occur bilaterally. Bochdalek hernias can occur anywhere along the posterior costodiaphragmatic margin and usually contain retroperitoneal fat or a kidney in adults.