Pars plana vitrectomy and subretinal surgery for ocular toxocariasis

Area of Science:

• Ophthalmology
• Parasitology
• Immunology

Background:

• Ocular toxocariasis is a parasitic infection of the eye caused by the larvae of the dog roundworm Toxocara canis.
• It can lead to vision-threatening complications, including granuloma formation in the retina and macula.
• Understanding the clinical course and chronological development of these granulomas is crucial for effective management.

Observation:

• The study reports the clinical course of ocular toxocariasis, focusing on the development of peripheral retinal and macular granulomas.
• Pars plana vitrectomy and retinotomy techniques were employed to surgically remove both epiretinal and subretinal components of the granuloma.
• The surgical intervention aimed to address the inflammatory mass and its impact on ocular structures.

Findings:

• Surgical removal of the granuloma yielded an excellent clinical result.
• Clinicopathologic correlation of the excised specimen confirmed the diagnosis of ocular toxocariasis.
• Histological examination revealed degenerated larval structures within the granulomatous inflammation, providing definitive evidence of the parasitic infection.

Implications:

• Surgical intervention, including pars plana vitrectomy and retinotomy, can be an effective treatment for ocular toxocariasis with granuloma formation.
• Clinicopathological correlation is essential for confirming the diagnosis and understanding the disease process.
• This study highlights the importance of early diagnosis and appropriate management to preserve vision in patients with ocular toxocariasis.