Diaphragmatic eventration refers to an abnormal contour of the diaphragmatic dome. It typically affects only a segment of the hemidiaphragm, compared to paralysis/weakness where the entire hemidiaphragm is typically affected.
Diaphragmatic eventration is congenital in nature and due to incomplete muscularisation of the diaphragm with a thin membranous sheet replacing normal diaphragmatic muscle. Over time this region stretches and on inspiration does not contract normally.
Frequently eventration is seen in the a anteromedial portion of the right hemidiaphragm.
Elevation of the affected portion of the diaphragm is usually seen as a smooth hump, while the remainder of the hemidiaphragm contour is normal.
- may be a sharp border between eventrated portion and the remainder of the hemidiaphragm 4
Possible consderations on plain film includes
- 1. Verhey PT, Gosselin MV, Primack SL et-al. Differentiating diaphragmatic paralysis and eventration. Acad Radiol. 2007;14 (4): 420-5. doi:10.1016/j.acra.2007.01.027 - Pubmed citation
- 2. Oh A, Gulati G, Sherman ML et-al. Bilateral eventration of the diaphragm with perforated gastric volvulus in an adolescent. J. Pediatr. Surg. 2000;35 (12): 1824-6. doi:10.1053/jpsu.2000.19271 - Pubmed citation
- 3. Mantoo SK, Mak K. Congenital diaphragmatic eventration in an adult: a diagnostic dilemma. Singapore Med J. 2007;48 (5): e136-7. Singapore Med J (link) - Pubmed citation
- 4. Nason LK, Walker CM, McNeeley MF et-al. Imaging of the diaphragm: anatomy and function. Radiographics. 2012;32 (2): E51-70. doi:10.1148/rg.322115127 - Pubmed citation
Synonyms & Alternative Spellings
|Synonyms or Alternative Spelling||Include in Listings?|
|Eventration of the diaphragm||✗|
|Eventration of diaphragm||✗|