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Lessons of the month 2: A case of Behçet’s disease: 70% have ophthalmic involvement

Ishna Auluck, Ayesha Karimi and Simon Taylor
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DOI: https://doi.org/10.7861/clinmed.2019.0149
Clin Med November 2019
Ishna Auluck
ASt Peter’s Hospital, Chertsey, UK
Roles: foundation doctor
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Ayesha Karimi
BRoyal Surrey County Hospital, Guildford, UK
Roles: ophthalmology registrar
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  • For correspondence: ayeshakarimi@nhs.net
Simon Taylor
BRoyal Surrey County Hospital, Guildford, UK
Roles: ophthalmology consultant
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ABSTRACT

A 34-year-old man presented to the emergency department with acute painless loss of vision of the left eye. Past medical history included painful lumps in the legs and frequent mouth ulcers, which were undiagnosed. The patient’s visual acuity was 6/5 and counting fingers in the right and left eye, respectively. There were extensive intraretinal haemorrhages and venous sheathing in the superior quadrant of the left eye with associated disc oedema. The case was discussed in a multidisciplinary team meeting in the presence of ophthalmology, dermatology and immunology and a diagnosis of Behçet’s disease was reached. The patient was commenced on intravenous methylprednisolone for 3 days followed by a switch to oral prednisolone. Due to recalcitrant uveitis, an intravitreal dexamethasone implant was administered. Eventually, systemic azathioprine and infliximab were commenced with frequent review by ophthalmology and immunology. The macular oedema improved but, unfortunately, the patient’s visual acuity did not recover. Behçet’s disease is a complex vasculitis involving multiple organ systems. Ocular manifestations can occur in 70% of patients, comprising retinal vasculitis, anterior uveitis, iridocyclitis, chorioretinitis, scleritis, keratitis, vitreous haemorrhage, optic neuritis, conjunctivitis, retinal vein occlusion and retinal neovascularisation. A tailored multidisciplinary approach is required, with corticosteroids being the mainstay of treatment.

KEYWORDS
  • Behçet’s
  • ophthalmology
  • rheumatology
  • immunology
  • autoimmune

Introduction

Behçet’s disease (BD) was first described in 1937 by Turkish dermatologist and scientist, Hulusi Behçet, as a classic tri-symptom complex of hypopyon, iritis and orogenital aphthosis.1 We now know BD as a chronic, relapsing-remitting, occlusive vasculitis with multi-organ involvement including aphthous ulceration of the oral mucous membrane, genital ulceration, uveitis, erythema nodosum, arthritis, thrombophlebitis, colitis and neurological disturbances.2,3 Histologically, there is a combination of perivascular neutrophilic or lymphocytic infiltration, endothelial cell damage, coupled with a prothrombotic tendency.4–6 The prevalence is mainly in the Mediterranean basin and there is a prominent similarity of the distribution to the ancient Silk Road, suggesting that an inherited tendency to develop BD was spread by merchants who travelled these trading routes.7–9 BD is more predominant in males in their 2nd to 4th decade of life.10,11 Currently the cause of BD is unknown but it is believed that immunogenetics, immune regulation, vascular abnormalities or bacterial and viral infections may play a role.12–19

Ocular manifestations

Ocular manifestations can occur in 70% of patients.20 The most visually affecting presentation is that of retinal vasculitis.21 Other ocular presentations include anterior uveitis, iridocyclitis, chorioretinitis, scleritis, keratitis, vitreous haemorrhage, optic neuritis, conjunctivitis, retinal vein occlusion and retinal neovascularisation.22 Decreased visual acuity is a result of retinal vasculitis, macular oedema, secondary glaucoma and cataracts.23 The Japanese Ministry of Health, Labour and Welfare’s Behcet’s Disease Research Committee previously stated that individuals with ocular involvement would have a visual acuity of less than 0.1 at 8 years; with 40% of cases leading to blindness in about 10 years.24,25 However, visual prognosis has been improving with the recent moderation of BD and development of new therapies.

Case presentation

A 34-year-old man presented to the emergency department with acute painless loss of vision of the left eye. Past medical history included painful lumps in the legs and frequent mouth ulcers, which was undiagnosed.

On ocular examination the patient’s visual acuity was 6/5 in the right eye and counting fingers in the left eye. The anterior segments were unremarkable bilaterally with intraocular pressures of 13 to 14 mmHg in each eye. Fundal examination of the right eye was normal (Figs 1a and b). There were extensive intraretinal haemorrhages and venous sheathing in the superior quadrant of the left eye with associated disc oedema (Figs 1c and d). Optical coherence tomography showed macular oedema of the left eye (Fig 2).

Fig 1.
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Fig 1.

Fundal photograph of the a) right eye’s optic disc, b) right eye’s macula, c) left eye’s optic disc and d) left eye’s macula showing extensive retinal haemorrhages and venous sheathing in the superior quadrant.

Fig 2.
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Fig 2.

Optical coherence tomography of the a) right eye and b) left eye showing macular oedema.

The case was discussed in a multidisciplinary team meeting in the presence of ophthalmology, dermatology and immunology and a diagnosis of BD was reached. The patient was started on intravenous methylprednisolone for 3 days followed by a switch to oral prednisolone. Due to recalcitrant uveitis, an intravitreal dexamethasone implant was administered. Eventually, systemic azathioprine and infliximab were commenced with frequent review by ophthalmology and immunology. The macular oedema improved but, unfortunately, the patient’s visual acuity did not recover (Fig 3).

Fig 3.
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Fig 3.

Optical coherence tomography of the left eye a) after initiating treatment and b) at completion of steroids and immunotherapy.

Management

BD requires a multidisciplinary approach, with input from dermatology for the evaluation of mucocutaneous lesions; ophthalmology for ocular involvement; rheumatology or orthopaedics for evaluation of joint involvement; neurology and psychiatry for central nervous system (CNS) involvement; internal medical specialists for evaluation of gastrointestinal (GI), pulmonary, renal or endocrine disorders; general surgeons for evaluation of GI tract involvement; cardiologists for cardiovascular disease and ear, nose and throat or dental specialists for evaluating the oral cavity. Treatment of BD is symptomatic and empirical, ie the choice of treatment depends on the site and severity of clinical manifestations. Corticosteroids are the mainstay for all clinical features.26 They are beneficial in the acute manifestations of BD, but there is no definite evidence in the effectiveness in controlling disease progression. Importantly, adverse effects of long-term therapy with corticosteroids must be considered. Other treatment modalities do exist. Mucocutaneous lesions and arthritis can be treated with non-steroidal anti-inflammatory drugs, zinc sulphate, levamisole, colchicine, dapsone or immunosuppressive therapies, including azathioprine, chlorambucil or cyclophosphamide.27 Uveitis and CNS involvement can be managed by azathioprine, cyclosporine or methotrexate.28 For patients who develop vascular complications and thrombosis, an important consideration is appropriate anticoagulation. Other therapeutic approaches that have been trialled include interferon (IFN) alfa, IFN gamma, acyclovir depending on patient response and tolerance to adverse effects.29,30

Summary

BD is a complex vasculitis involving multiple organ systems. Ocular manifestations are common. A tailored multidisciplinary approach is required in the management, with corticosteroids being the mainstay of treatment.

Key messages

  • Behçet’s disease often involves input from immunology and rheumatology, however ocular manifestations can occur in 70% of patients, with visually significant manifestations if diagnosed late, so input from ophthalmology should be sought early.

  • We describe and provide images of a case of Behçet’s uveitis.

  • We explore management options and how an intravitreal steroid implant improved retinal oedema.

  • This case signifies the systemic associations of Behçet’s disease and emphasises the importance of a tailored multidisciplinary approach in disease management.

  • © 2019 Royal College of Physicians

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Lessons of the month 2: A case of Behçet’s disease: 70% have ophthalmic involvement
Ishna Auluck, Ayesha Karimi, Simon Taylor
Clinical Medicine Nov 2019, 19 (6) 519-522; DOI: 10.7861/clinmed.2019.0149

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Lessons of the month 2: A case of Behçet’s disease: 70% have ophthalmic involvement
Ishna Auluck, Ayesha Karimi, Simon Taylor
Clinical Medicine Nov 2019, 19 (6) 519-522; DOI: 10.7861/clinmed.2019.0149
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