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Ocular Larva Migrans
Aka: Ocular Larva Migrans, Ocular Toxocariasis
- See Also
- Visceral Larva Migrans
- Epidemiology
- Age of onset: 5-8 years old (mean)
- Incidence: 700 cases per year in United States
- Pathophysiology
- Roundworm infection (Toxocariasis)
- Spreads to eye from concurrent Visceral Larva Migrans
- Symptoms
- Gradual or sudden unilateral visual loss
- Eye discomfort
- Symptoms of Visceral Larva Migrans often absent
- Strabismus
- Signs: Slit Lamp Exam
- Leukocoria
- Endophthalmitis
- Choroidal Granuloma (subretinal Granulomatous mass)
- Posterior pole Granuloma
- Peripheral Granuloma with traction bands
- Labs
- Eosinophilia (rare)
- Eosinophils in Aqueous Humor
- Differential Diagnosis
- Retinoblastoma
- Strabismus
- Exudative retinitis (Coat's disease)
- Complications
- Ocular inflammation with scarring with risk of Vision Loss
- Course
- Ocular symptoms may present up to 10 years after infection
- Management
- No satisfactory treatment
- Trial of Corticosteroids
- Surgery may be indicated in severe cases
- See Visceral Larva Migrans
- Resources
- CDC Toxocariasis
- http://www.cdc.gov/parasites/toxocariasis/
- References
- Woodhill (2014) Am Fam Physician 89(10): 803-11 [PubMed]