eventration of diaphragm

Etiology

• congenital anomal

Pathology

• incomplete muscularization of the diaphragm with a thin membranous sheet replacing normal diaphragmatic muscle
• the region stretches & on inspiration does not contract normally
• frequently occurs in the anteromedial portion of the right hemidiaphragm
• complete eventration almost invariably occurs on the left side; it is rare on the right

Radiology

• elevation of the affected portion of the diaphragm is usually seen as a smooth hump on the normal contour of the hemidiaphragm

Differential diagnosis

• diaphragmatic paralysis

More general terms

• muscular disease; myopathy
• congenital
• anomaly