Orbital Silicone Migration Following Pars Plana Vitrectomy With Perfluorocarbon Liquid Silicone Oil Exchange and Endolaser Retinopexy in a Dog.

Silicone oil migration into orbital tissues is a potential serious complication of canine vitreoretinal surgery.

This case report documents the first known instance of orbital silicone oil migration in a veterinary patient following pars plana vitrectomy with perfluorocarbon liquid-silicone oil exchange for retinal detachment treatment. A 5-year-old mixed-breed dog presented with progressive exophthalmos beginning 6 weeks post-operatively, which advanced over 10 months to include panuveitis, globe deviation, and chronic keratitis. B-mode ultrasound revealed hypoechoic material compressing the posterior sclera circumferentially. Enucleation and histopathological analysis confirmed orbital and periocular silicone oil cellulitis with characteristic clear spaces lined by flattened polygonal cells. Contributing factors likely included pre-existing scleral ectasia identified intraoperatively, incomplete scleral port closure, scleral atrophy following cautery, or chronic postoperative inflammation. This complication highlights the importance of meticulous surgical technique and careful patient monitoring following vitreoretinal procedures in veterinary ophthalmology.

This summary was distilled by AI and may occasionally misinterpret data. Confirm critical details with the primary literature before clinical application.