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Ocular toxocariasis: atypical clinical course
  1. Cristina Fonseca1,
  2. Andreia Mendes Silva2,
  3. Sandra Freire3 and
  4. Rui Proença1
  1. 1 Ocular Inflammation Unit, Ophthalmology Department, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
  2. 2 Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
  3. 3 Pediatric Ophthalmology Unit, Ophthalmology Department, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
  1. Correspondence to Dr Cristina Fonseca, cristina_ffonseca{at}


A 17-year-old man presented to the emergency department with complaints of retro-orbital pain of the left eye and an altitudinal visual field defect for 2 weeks. Fundus examination revealed ipsilateral hyperaemic optic disc oedema, and the patient was admitted with the presumptive diagnosis of left optic neuritis. Subsequently, during follow-up, the patient developed a retinal granulomatous lesion in the superior temporal arcade with vitritis and fibrotic strands extending to the mid-periphery. Serum antibodies detection by ELISA and aqueous humour immunoblot were positive for Toxocara canis. Medical therapy with albendazole and oral steroids was instituted with satisfactory results. One year later, a new macular lesion developed with consequent vision loss.

  • retina
  • macula

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  • Contributors CF and AMS contributed to the acquisition of data, its analysis and interpretation, drafting of the manuscript and final approval. SF and RP contributed to the critical revision of the manuscript and approved the final version of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Obtained.