Recurrent Neuroretinitis: A Unique Presentation of Behçet's Disease in a Child.

We describe a case of Behçet's disease (BD) in a young child that presented with recurrent neuroretinitis and developed retinal lesions during follow-up. A 4.5-year-old girl presented with fever of 39.5°C, erythema nodosum in her legs, bilateral knee arthritis, and perineum aphthae. On ocular examination, visual acuity was 20/25 in both eyes. Right eye examination was normal and the left eye (LE) showed mild anterior and intermediate uveitis, normal optic disc, and a macular star appearance. Laboratory workup demonstrated elevated C-reactive protein levels, a normal abdominal ultrasound, and a normal colonoscopy. The patient was diagnosed with BD. One month post initial presentation, the patient presented with visual acuity of finger counting in the LE with significant anterior uveitis, mild intermediate uveitis, and recurrent neuroretinitis. Under treatment of IV methylprednisolone, oral betamethasone, infliximab, and colchicine, a complete systemic remission was noticed, and uveitis became quiescent. On last examination, 4.5 years post first presentation, visual acuity was 20/25 in both eyes and the LE demonstrated a remnant of a juxtafoveal retinal scar. To the best of our knowledge, this is the first case of neuroretinitis presenting as a manifestation of pediatric BD. Ophthalmologists should be aware of these unique manifestations of ocular BD.

Introduction

Behçet's disease (BD) is a chronic, relapsing vasculitis of all vessel sizes and most common in countries along the ancient “Silk Road” [1]. Disease diagnosis is based on clinical finding and there are 17 sets of diagnosis/classification criteria for BD [2]. In pediatric BD, the diagnosis is usually made according to the consensus classification criteria for pediatric Behçet's disease (PEDBD) [3], which contains six categories: recurrent oral aphthosis, genital ulceration or aphthosis, skin involvement (erythema nodosum, acneiform lesions, papulopustular lesions, or skin ulceration), ocular involvement, neurological signs (headaches or papilledema), and vascular signs (vessel thrombosis or aneurysm). A minimum of three signs (each in a distinct category) defines pediatric BD.

Uveitis is the most common ocular manifestation of BD, mainly anterior non-granulomatous, which may be associated with hypopyon. In addition, vitritis, retinal infiltrates, and occlusive vasculitis are signs of posterior segment involvement [4, 5].

Case Report

The patient was a 4.5-year-old girl born in Israel, with a Kurdish, Iraqi, and Yemenite ancestry. Medical family history included fathers' ulcerative colitis and psoriasis. The girl presented with fever of 39.5°C, erythema nodosum in both legs, bilateral knee arthritis, and perineum aphthae. On ocular examination, BCVA was 20/25 in both eyes. Right eye (RE) examination was normal and the left eye (LE) showed mild anterior uveitis with cells +1, mild intermediate uveitis with vitreous haze +1, and a normal optic disc accompanied by a macular star appearance compatible with late-stage neuroretinitis (Fig. 1).

Fig. 1

Fundus photograph of the left eye at presentation showing exudates arranged as a macular star.

The differential diagnosis at this stage included an infectious disease such as cat scratch disease and a non-infectious disease such as Crohn's disease, sarcoidosis, or BD. But with other systemic findings, differential diagnosis was narrowed to Crohn's disease or BD. Laboratory workup demonstrated leukocytosis of 20K with 76% neutrophils, increased C-reactive protein of 89 mg/L (normal range 0–5), ESR 84 mm/h, normal chemistry, normal levels of ACE, negative ANA, normal levels of ASLO, and negative serology for Bartonella henselae. Abdominal ultrasound, colonoscopy, and colon biopsy were all normal. The diagnosis of Crohn's disease was ruled out and the patient was diagnosed with BD according to the PEDBD criteria [3] (four signs − erythema nodosum, arthritis, perineum aphthae, and uveitis). Treatment included naproxen 125 mg BID, colchicine 1 mg QD, betamethasone 1.5 mg QD (tapered down 0.5 mg every 2 weeks), and topical treatment with dexamethasone 0.1% eye drops. One month post initial presentation, under betamethasone 0.5 mg × 1/day, the patient presented with BCVA of 20/30 in the RE and finger counting in the LE. The RE presented with mild intermediate uveitis and the LE presented with significant anterior uveitis (cells +4, flare +2) mild intermediate uveitis (vitreous haze +1) and recurrent neuroretinitis. RE ocular coherence tomography (OCT) was normal and LE OCT demonstrated hyperreflective foci in the vitreous compatible with vitritis, subretinal fluid extending between the optic disc and the macula, intra-retinal cysts, and hyperreflective foci compatible with intraretinal exudates. LE ultrasound was performed because of poor posterior pole visualization and demonstrated thickening of posterior coats, fluid in the sub-Tenon space, and exudative retinal detachment (Fig. 2). Because of the acute presentation, treatment with IV methylprednisolone pulse was given, followed by IV methylprednisolone 2 mg/day for 5 days, then oral betamethasone 1.5 mg × 2/day, which was slowly tapered. In addition, infliximab 10 mg/kg at 0, 2, and 6 weeks, then every 4 weeks, was commenced.

Fig. 2

aHorizontal scan encompassing the fovea of the left eye showing hyperreflective foci in the vitreous compatible with vitritis, subretinal fluid extending between the optic disc and the macula, thickening of the retinal nerve fiber layer correlating with optic nerve edema, intra-retinal cystoid hydration, and hyperreflective foci compatible with exudates at the level of the outer plexiform layer. bB-scan ultrasound showing thickening of posterior coats, fluid in the sub-Tenon space, and exudative retinal detachment.

Two weeks later, the vitritis resolved and retinal lesions were noticed in the periphery of both eyes and adjacent to the fovea in the LE. Methotrexate 15 mg/kg was added to the regimen; however, it was stopped after 1 month due to elevated liver enzymes and was switched to azathioprine 30 mg/day. Under this treatment a complete systemic remission was noticed, uveitis became quiescent, and most of the retinal lesions resolved.

On last examination, 4.5 years post first presentation, under treatment with infliximab 5 mg/kg every 3 months and colchicine 0.5 mg QD, no systemic findings were noted, BCVA was 20/25 in both eyes, and the LE demonstrated a remnant of a juxtafoveal retinal scar (Fig. 3).

Fig. 3

Follow up 4.5 years after initial presentation. aFundus photograph showing a remnant of a juxtafoveal retinal scar. To mention, although normal, the optic disc appears pale due to overexposure of the fundus photograph. bHorizontal OCT scan showing normal foveal contour without subretinal or intraretinal fluid. Nasal to the fovea hyperreflective thickening of the RPE and irregularity of the external layers, compatible with a retinal scar seen clinically.

Discussion

Our patient presented with systemic findings of fever, rash, arthritis, perineum aphthae, and LE panuveitis including a late-stage neuroretinitis. During follow-up, recurrent neuroretinitis developed in the LE with retinal lesions in both eyes. The final diagnosis was BD according to the PEDBD [3] classification. This case presents a unique ocular manifestation of BD in a young child.

The onset age of BD is usually 25–30 years, but it may occur before the age of 16 years in 4–26% of cases [6, 7, 8]. A prospective observational cohort study, including 42 centers from 12 countries, with a total of 230 patients diagnosed with pediatric BD, found that oral aphthosis was the presenting sign for 81% of patients, mean age at first symptom was 7.4 ± 4.2 years (range 0–15.9 years), and the mean age of onset of uveitis was 10.9 ± 3.6 years [9]. In addition, the ocular clinical findings included anterior uveitis in 23.7% of the patients, posterior uveitis in 21.5%, retinal vasculitis in 9.1%, venous thrombosis in 9.6%, and arterial thrombosis or aneurysm in 1.8% of the patients [9]. Our patient was young, 4.5 years old at presentation, and presented with anterior and intermediate uveitis, but the most impressive ocular finding at presentation was LE neuroretinitis, a very rare finding in BD, which was described in only two adult BD patients [10, 11]. Schwartz et al. [10] described a case of a 23-year-old male who was diagnosed with BD with ocular manifestations of bilateral anterior uveitis, intermediate uveitis, neuroretinitis, and a unilateral superior hemi vein occlusion with frosted branch angiitis pattern. Al-Mujaini and Wali [11] reported on a 28-year-old male who was diagnosed with BD and presented with bilateral frosted branch angiitis and neuroretinitis. Moreover, to date, no case described a recurrent neuroretinitis in a BD patient.

Our patient was treated with systemic corticosteroids and corticosteroid-sparing agents, including methotrexate, azathioprine, and infliximab. Under this treatment, the patient demonstrated a very good response with complete resolution of all systemic manifestations and no active uveitis in a long-term follow-up.

Conclusions

To the best of our knowledge, this is the first case of neuroretinitis presenting as a manifestation of pediatric BD. In addition, our patient developed recurrent neuroretinitis and retinal lesions during follow-up with a final finding of a macular scar, which is an atypical ocular appearance in BD. Ophthalmologists should be aware of these unique manifestations of ocular BD.

Statement of Ethics

Patient's consent has been waived by the Institutional Review Board (IRB) of the Tel Aviv Medical Center, Israel.

Conflict of Interest Statement

The authors have no financial disclosures.

Funding Sources

No funding or grant support.

Author Contributions

Gilad Rabina: writing and revising the manuscript. Gil Amarilyo: revising the manuscript, writing the rheumatology part of the manuscript. Dinah Zur: revising the manuscript, interpretation of OCT and US. Liora Harel: writing the rheumatology part of the manuscript. Zohar Habot: writing and revising the manuscript. All authors approve the final version of the manuscript. All author attests that they meet the current ICMJE criteria for authorship.