Sympathetic Ophthalmia (SO) is a rare disease that presents as a bilateral, diffuse, granulomatous panuveitis. Sympathetic Ophthalmia is a clinical diagnosis with history of penetrating ocular injury in the inciting eye and presence of panuveitis in the sympathizing eye. Though early enucleation is believed to minimize the risk, there have been reports of SO even after enucleation of inciting eyes. The possible association between vitrectomy and SO has been initially proposed by Gass  and later studied extensively in a large cohort in the UK with an estimated SO risk of 1 in 799 vitrectomies . There have been several case series and reports of SO following vitrectomy, however only three documented cases of SO following vitrectomy without use of silicone oil with an onset of SO ranged between 4 weeks to 2 months. We present a patient with SO in the sympathizing eye presenting 16 days after an uncomplicated 23-gauge (23G) sutureless pars plana vitrectomy (PPV) without the use of silicone oil.
A 60-year-old Indian male presented with macula-off retinal detachment with multiple tears in his left eye (OS) and underwent 23G pars plana vitrectomy, endodiathermy, endodrainage, endolaser photocoagulation, and 15% octafluoropropane gas (C3F8) OS. His past medical history was significant for thyroid cancer and total thyroidectomy and past ocular history was significant for cataract extraction and posterior chamber intraocular lens (PCIOL) implantation OS nine years ago with no history of intraocular trauma or surgery in the right eye (OD). His postoperative course was relatively unremarkable until he reported relative scotoma in the fellow eye (OD) on postoperative day 16. On examination, his visual acuity was hand-motion OD (from a baseline of 20/30-2) and counting-fingers (CF) OS from the postoperative gas bubble. Slit lamp exam (SLE) revealed no anterior chamber (AC) cells or flare OD, rare AC cell without flare OS and dilated fundus examination (DFE) showed serous retinal detachment of the macula with no disc edema, vascular sheathing, or vitritis OD (Fig. 1), and an attached retina with approximately 70% C3F8 gas fill OS. Optical coherence topography (OCT) confirmed a serous macular detachment with nasal pigment epithelial detachment (PED) (Figure 2a).
The patient was initially treated with acetazolamide (Diamox) for presumptive Central Serous
Chorioretinopathy (CSR) with initial improvement in subretinal fluid (SRF) and visual acuity (OD:
20/200) (Figure 2b). However, two weeks later, the patient developed new bilateral granulomatous panuveitis with bilateral 1+ conjunctival injection, AC cell and flare, 2+ vitreous cells with haze OD greater than OS and disc edema OS. Quantiferon gold test was negative. He was diagnosed with Sympathetic Ophthalmia and he was started on high dose prednisone (80mg PO Daily). Peripheral retinal ischemia and a rhegmatogenous retinal detachment developed in the right eye and so he was converted to intravenous pulse steroids for three days in order to quiet the inflamed eye prior to retinal detachment repair.
An FA performed prior to starting IV steroids showed notable hyperfluorescene of the optic nerves in both eyes and significant inferotemporal nonperfusion with pruning of vessels temporally OD (Figure 3). A combined cataract extraction, PCIOL insertion and retinal detachment repair with PPV, endolaser, air-fluid exchange and C3F8 gas was performed on the right eye approximately 6 weeks after the left eye retinal detachment repair was performed.
Over the next year, the patient was managed at the National Institute of Health (NIH) with systemic immune suppression, topical and local anti-inflammatory treatment to the left eye. At the one year follow-up, the patient’s vision is OD: 20/200 and OS: 20/25-1. An OCT OD shows an epiretinal membrane (ERM) with loss of foveal contour, mild intraretinal edema and significant irregularity of the retinal pigment epithelium (RPE) (figure 4).
Sympathetic Ophthalmia has been associated with specific major histocompatibility antigens (MHC) and patients are likely to express human leukocyte antigen (HLA) DR4 (closely related to HLA-DQw3 and HLA-DRw53) phenotype . These specific marker associations suggest a role for immune dysregulation, increased susceptibility, and increased severity associated with pathogenesis .
Although the etiology is not clearly understood, it encompasses autoimmunity and cell-mediated immune mechanisms. It has been postulated to be a delayed-hypersensitivity reaction [2,5]. Interestingly our patient was positive for HLA-DR4.
The eye is considered an immune privileged site and SO requires sequestered ocular antigens to be exposed systemically, likely from a scleral perforation, whether surgical or traumatic. Though a link between SO and vitrectomy was made in the 1980s, only a few cases of SO have been reporter following uncomplicated vitrectomy without the use of silicone oil or without antecedent trauma or endophthalmitis. In most cases the average time of onset of SO was 2 months to one year . There are only two cases of SO [1,16] that occurred 5 weeks to 2 months after small incision PPV without the use of silicone oil for tamponade. To the best of our knowledge, our case presented here represents the earliest case of SO following 23G sutureless vitrectomy for RD without silicone oil and antecedent trauma with an onset at 16 days following surgery. Sympathetic Ophthalmia should be considered in cases of new onset posterior uveitis soon after vitrectomy.