Extra-papillary Myelin Fiber of Incidental Finding: A Case Report

##plugins.themes.bootstrap3.article.main##

  •   Soukaina Haddougui

  •   Mounia Bouchaar

  •   Salma Bajjouk

  •   Yassine Mouzari

  •   Karim Reda

  •   Abdelbarre Oubaaz

Abstract

We report an observation of an uncommon form of extra-papillary myelin fibers of fortuitous discovery in a patient, 55 years old, who consulted for a change of correction.


The clinical aspect of the fundus led to the diagnosis of retinal myelin fibers in front of a whitish placard with a finely striated scalloped edge, partially masking the vessels and located at the level of the inferior temporal arch.


These fibers, contiguous to the papilla or distant from it, have an incidence varying from 0.57% to 0.98% according to studies and their pathogenesis is still uncertain. This congenital anomaly of the retinal fibers of clinical diagnosis is often asymptomatic, but can however be associated with other ocular disorders.


Keywords: Fundus, myelin fiber, myopia, retina

References

Robert M, Lebranchu P. Pathologie développementale du nerf optique. In : Denis D, Bui Quoc E, Aziz-Alessi A. Ophtalmologie pédiatrique. Rapport de la SFO. Issy-les-Moulineaux : Elsevier Masson; 2017: 533-544. French.

Tarabishy AB, Alexandrou TJ, Traboulsi EI. Syndrome of myelinated retinal nerve fibers, myopia, and amblyopia: a review. Surv Ophthalmol. 2007; 52: 588-96. DOI: https://doi.org/10.1016/j.survophthal.2007.08.016

Velasque L, Montemousque B. Retinal myelin fibers. Review of the literature about a case. J Fr Ophthalmol. 2000; 23: 892-896.

Straatsma BR, Foos RY, Heckenlively JR, Taylor GN. Myelinated retinal nerve fibers. Am J Ophtalmol. 1981; 91: 25-38. DOI: https://doi.org/10.1016/0002-9394(81)90345-7

Ali B, Logani S, Kozlov K, Bateman B. Progression of retinal nerve fiber myelination in childhood. Am J Ophthalmol. 1994; 118: 515- 517. DOI: https://doi.org/10.1016/S0002-9394(14)75805-2

Berliner ML. Cytologic studies on the retina: normal coexistence of oligodendroglia and myelinated nerve fibers. Arch Ophthalmol. 1931; 6: 740. DOI: https://doi.org/10.1001/archopht.1931.00820070769009

French Constant C, Miller RH, Burne JF, Raff MC. Evidence that migratory oligodendrocyte type 2 astrocyte (0-2a) progenitor cells are kept out of the rat retina by a barrier at the eye end of the optic nerve. J Neurocytol. 1988; 17; 13. DOI: https://doi.org/10.1007/BF01735374

Straatsma BR, Foos RY, Heckenlively JR, Taylor GN. Myelinated retinal nerve fibers: clinico-pathologic study and clinical correlations. Excerpta Med. 1978; 32(442): 36.

Rosen B, Barry C, Constable I. Progression of myelinated retinal nerve fibers. Am J Ophthalmol. 1999; 127: 471-473. DOI: https://doi.org/10.1016/S0002-9394(98)00377-8

Teich SA. Disappearance of myelinated retinal nerve fibers after a branch retinal artery occlusion. Am J Ophthalmol. 1987; 103: 835- 837. DOI: https://doi.org/10.1016/S0002-9394(14)74409-5

Silvestri G, Sehmi K, Hamilton P. Retinal vascular abnormalities a rare complication of myelinated nerve fibers? Retina. 1996; 16: 214- 218. DOI: https://doi.org/10.1097/00006982-199616030-00005

Leys A, Leys M, Hooymans J, Craandijk A, De Laey JJ. Myelinated nerve fibers and retinal vascular abnormalities. Retina, 1996; 16(2): 89-96. DOI: https://doi.org/10.1097/00006982-199616020-00001

Bynke H, Bynke G. Atrophy of myelinated retinal nerve fibers following pituitary surgery. Neuro- Ophthalmol. 1989; 9(3): 179-185. DOI: https://doi.org/10.3109/01658108909010471

Gupta A, Khandalavala B, Bansal RK, Jain I, Grewal S. Atrophy of myelinated nerve fibers in pituitary adenoma. J Clin Neuro Opht. 1990; 10(2): 100-102.

Kodama T, Hayasaka S , Setogawa T. Myelinated retinal nerve fibers: prevalence, location and effect on visual acuity. Ophtalmologica, 1990; 200: 77-83. DOI: https://doi.org/10.1159/000310082

Karadimas P, Kapetanios A , Panayotidhou E , Bouzas EA . Epiretinal Membrane Occurring with Myelinated Retinal Nerve Fibers and Vascular Abnormalities. Retina. 2003; 23: 880-881. DOI: https://doi.org/10.1097/00006982-200312000-00027

Most read articles by the same author(s)

1 2 > >>