April 2010
Volume 51, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2010
Spectral Domain Optical Coherence Tomography of an Intravitreal Parasite
Author Affiliations & Notes
  • M. J. Espiritu
    Ophthalmology,
    Weill Cornell Medical College, New York, New York
  • A. A. Khanifar
    Ophthalmology,
    Weill Cornell Medical College, New York, New York
  • A. N. Schuetz
    Pathology and Laboratory Medicine,
    Weill Cornell Medical College, New York, New York
  • S. G. Jenkins
    Pathology and Laboratory Medicine,
    Weill Cornell Medical College, New York, New York
  • D. J. D'Amico
    Ophthalmology,
    Weill Cornell Medical College, New York, New York
  • R. V. P. Chan
    Ophthalmology,
    Weill Cornell Medical College, New York, New York
  • Footnotes
    Commercial Relationships  M.J. Espiritu, None; A.A. Khanifar, None; A.N. Schuetz, None; S.G. Jenkins, None; D.J. D'Amico, None; R.V.P. Chan, None.
  • Footnotes
    Support  Support provided by an institutional grant by Research to Prevent Blindness (MJE, AAK, RVPC, DJD) and The St. Giles Foundation (RVPC).
Investigative Ophthalmology & Visual Science April 2010, Vol.51, 329. doi:https://doi.org/
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      M. J. Espiritu, A. A. Khanifar, A. N. Schuetz, S. G. Jenkins, D. J. D'Amico, R. V. P. Chan; Spectral Domain Optical Coherence Tomography of an Intravitreal Parasite. Invest. Ophthalmol. Vis. Sci. 2010;51(13):329. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract
 
Purpose:
 

Parasitic involvement of the vitreous is rare. Indirect ophthalmoscopy,ultrasonography, and scanning electron microscopy play rolesin imaging intraocular parasites, but spectral domain opticalcoherence tomography (SD-OCT) has not been utilized. We reportthe first case in which SD-OCT of an intraocular parasite andassociated retinal lesions was performed.

 
Methods:
 

A 37-year-old Hispanic man presented with uveitic glaucoma anda curved floater in his left eye for one week. Examination revealedan intravitreal parasite. Color fundus photography and SD-OCTwere performed. The parasite was extracted from the vitreouscavity via 23-gauge pars plana vitrectomy.

 
Results:
 

Color photograph of the parasite is demonstrated in Figure 1A.Three-dimensional (3D) reconstruction of the parasite is shownin Figure 1B. SD-OCT B-scan revealed two concentric circlessuspended in the vitreous overlying the nasal retina. The internalcircle was hyper-reflective superiorly (Figure 2A) and iso-reflectiveinferiorly (Figure 2B). Macroscopically, the larva was red-brown,3 mm in length, and partially covered by a cuticle with minutebody spines. Due to artifact, the worm was not intact; however,it is most consistent with a Gnathostoma or Hypoderma species.

 
Conclusions:
 

This is the first reported case of SD-OCT imaging of an intravitrealparasite. SD-OCT allows non-invasive, high-resolution visualizationand 3D reconstruction of parasitic anatomy. Future SD-OCT ofthese and other parasites may help establish tomographic criteriafor identification of parasitic species.  

 

 
Keywords: imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • imaging/image analysis: clinical • vitreous 
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