Eventration of the Diaphragm

• Congenitally thin muscular portion of the hemidiaphragm
• Appears to increase with age
• Usually occurs anteromedially and on the right with a right to left ratio of 5:1
• When on left, it frequently involves the whole hemidiaphragm
• May contain liver or sometimes kidney on right

Clinical Findings

• Asymptomatic

Imaging Findings

• Smoothly marginated soft tissue density contiguous with the hemidiaphragm
• Appearance is characteristic

Treatment

• Not needed

 
Eventration of the Diaphragm. Frontal and lateral chest x-ray shows smooth elevation of right hemidiaphragm medially and anteriorly consistent with an eventration of the hemidiaphragm