Medicine:Berlin's edema
| Berlin's edema | |
|---|---|
| Other names | Berlin's oedema[1] |
Berlin's edema (commotio retinae) a common condition caused by blunt injury to the eye.[2] It is characterized by decreased vision in the injured eye a few hours after the injury. Under examination the retina appears opaque and white in colour in the periphery but the blood vessels are normally seen along with "cherry red spot" in the foveal region. This whitening is indicative of cell damage,[3] which occurs in the retinal pigment epithelium and outer segment layer of photoreceptors.[4][5] Damage to the outer segment often results in photoreceptor death through uncertain mechanisms.[6] Usually there is no leakage of fluid and therefore it is not considered a true edema. The choroidal fluorescence in fluorescent angiography is absent. Visual acuity ranges from 20/20 to 20/400.
The prognosis is excellent except in case of complications of choroidal rupture, hemorrhage or pigment epithelial damage, but damage to the macula will result in poorer recovery. The outcome can be worsened in the case of retinal detachment, atrophy or hyperplasia. Visual field defects can occur. In late cases cystoid macular edema sometimes develops which can further lead to macular destruction. Commotio retinae is usually self limiting and there is no treatment as such. It usually resolves in 3–4 weeks[7] without any complications and sequelae.
Diagnosis
Because it is noninvasive and comfortable, optical coherence tomography (OCT) is an important instrument in the evaluation of individuals with posterior segment trauma, particularly acute traumatic maculopathy. OCT findings in Berlin's edema have included increased reflectivity because of photoreceptor outer segment disruption and, less frequently, hyper-reflectivity of inner retinal layers. Other findings include increased central retinal thickness, a low signal triangular area below the foveal pit, and outer retinal thickening. Fracture of the inner segment/outer segment layer, change of retinal pigment epithelium interdigitation linked to intraretinal edema of the outer nuclear layer, neurosensory retinal detachment, and increased reflectivity of the line at the junction of the photoreceptor inner and outer segments in the healing phase have also been reported in Berlin's edema.[8]
References
- ↑ 'Oedema' is the standard form defined in the Concise Oxford English Dictionary (2011), with the precision that the spelling in the United States is 'edema'.
- ↑ Sheridan, Robert L.; Lhowe, Laurel C. (2004). The Trauma Handbook of the Massachusetts General Hospital. LWW Medical Book Collection. Philadelphia: Lippincott Williams & Wilkins. p. 274. ISBN 978-0-7817-4596-3. https://books.google.com/books?id=qb0eujBTVxoC&pg=PA274.
- ↑ Park, S. J.; Park, K. H.; Heo, J. W.; Woo, S. J. (2014-03-01). "Visual and anatomic outcomes of golf ball-related ocular injuries" (in en). Eye 28 (3): 312–317. doi:10.1038/eye.2013.283. ISSN 0950-222X. PMID 24384962.
- ↑ Recchia, Franco M.; Aaberg Jr., Thomas; Sternberg Jr., Paul (2006-01-01). Hinton, David R.. ed. Chapter 140 - Trauma: Principles and Techniques of Treatment A2 - Ryan, Stephen J.. Edinburgh: Mosby. pp. 2379–2401. doi:10.1016/b978-0-323-02598-0.50146-4. ISBN 9780323025980.
- ↑ Ah-kee, Elliott; Oladiwura, Dilys; Lim, Lik Thai; Scott, Angus (2014-05-19). "Macular optical coherence tomography findings following blunt ocular trauma" (in en). Clinical Ophthalmology 8: 989–92. doi:10.2147/opth.s64082. PMID 24899795.
- ↑ Chen, Jeannie; Geller, Scott; Flannery, John (2006-01-01). Hinton, David R.. ed. Chapter 8 - Structure and Function of Rod Photoreceptors A2 - Ryan, Stephen J.. Edinburgh: Mosby. pp. 153–170. doi:10.1016/b978-0-323-02598-0.50014-8. ISBN 9780323025980.
- ↑ Ghazanfari-Nasrabad, Mahdi; Amrollahi-Sharifabadi, Mohammad; Kargar-Bideh, Omidreza; Azizi-Sharifabad, Saeed (2016-01-01). "Permanent Ocular Injury Following Paintball Pellet Hit: A Medicolegal Case" (in en). Journal of Forensic Sciences 61 (1): 277–279. doi:10.1111/1556-4029.12917. ISSN 1556-4029. PMID 26211673.
- ↑ Nikkhah, Homayoun; Karrabi, Narges; Yazdanjou, Farangis (October 2, 2023). "Berlin’s Edema with Atypical Optical Coherence Tomography Findings: A Case Report". Case Reports in Ophthalmology (S. Karger AG): 491–497. doi:10.1159/000533886. ISSN 1663-2699. PMC 10601845. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10601845/. Retrieved November 14, 2023.
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