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Ординатура / Офтальмология / Английские материалы / Retinal Pharmacotherapy_Rodrigues, Nguyen, Farah_2010.pdf
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Uveitis• 22 chapPosteriorr

stromal vessels; and (4) disc hyperfluorescence. With treatment, the hypofluorescent spots decrease in number and disappear as disease activity subsides. The other ICGAfindings also diminish with response to treatment. ICGA is useful to detect subclinical choroidal inflammation53 and guide therapy.54 OCT may be utilized to quantify objectively the amount of subretinal fluid and resolution with treatment. Sympathetic ophthalmia (SO) can present similar to VKH, thus any history of penetrating ocular trauma or surgery should be thoroughly elicited.

treatment. Relapses are common with SO, hence the need for prolonged duration of treatment with corticosteroids and gradual tapering of steroid dosage only after prolonged, close follow-up. Good results have been reported on the use of tacrolimus,60 cyclosporine, and/or azathioprine,61,62 combined with corticosteroids for SO. Chlorambucil has also been used for intractable SO with induction of remission.63

Treatment modalities

Corticosteroids constitute the primary treatment for acute disease. VKH responds well to systemic steroids, although some reports suggest that use of immunomodulatory therapy as first-line therapy is associated with a superior visual outcome compared to using corticosteroid alone.55

Treatment of VKH typically requires an average of 6 months or longer, and the addition of a second, steroid-sparing agent allows the corticosteroid dose to be decreased, thereby preventing steroid-related complications. Methotrexate, cyclosporine, tacrolimus, azathioprine, and mycophenolate mofetil are the immunomodulatory agents used to treat VKH in reported series. The use of intravenous immunoglobulin has also been reported.56 In pediatric VKH cases, methotrexate was used as a steroid-sparing agent in steroid-resistant cases, with good results.57 Triple therapy with methotrexate, cyclosporine, and corticosteroid was necessary in one pediatric VKH case reported.58 The aggressive, early use of steroids and maintenance using immunosuppressive agents produces fairly good prognosis, with over half of patients having visual outcomes of 20/30 or better. Poor visual outcomes are associated with increased age of onset, poor response to corticosteroids requiring prolonged treatment, and CNV.

SYMPATHETIC OPHTHALMIA

Diagnostic features

Since its description by William MacKenzie in the mid 19th century, SO has generated much interest and has become one of the most wellknown forms of uveitis among lay people. SO is a rare form of bilateral panuveitis usually following nonsurgical trauma to one eye (the exciting eye) with consequent inflammation of the nontraumatized (sympathizing) eye. SO may also occur after ocular surgery and radiotherapy. The onset of SO occurs within 1 year of the inciting event in 90% of cases, but may occur decades later.

SO presents as granulomatous uveitis with anterior-chamber inflammation, mutton-fat keratic precipitates, vitritis, and posterior-segment abnormalities. Yellow lesions (Dalen–Fuchs nodules) are seen in the periphery of the choroid, sometimes becoming confluent. Secondary glaucoma or cataract may develop.

Classic histopathological features of SO include granulomatous uveal tract infiltration and collections of inflammatory cells under the RPE (Dalen–Fuchs nodules). Monocytes, or T-helper and B lymphocytes, may be the major cellular components in the choroidal infiltrates. The clinical presentation may be similar to VKH, thus it is important to determine if there is any history of penetrating trauma or surgery. ICGA has been used as adjunct to FA in evaluating response to therapy with hypofluorescent spots present in active disease resolving with therapy.59 OCT may be utilized to document decrease in subretinal fluid with treatment.

Treatment modalities

Earlier reports suggested that early enucleation of the inciting eye was beneficial in preventing SO. More recent studies have reported good visual outcomes with aggressive, early, and adequate immunosuppressive therapy. High-dose systemic steroids should be the initial

SUMMARY AND KEY POINTS

Advances in drug development have greatly expanded the spectrum of inflammatory eye diseases amenable to pharmacotherapy. The great majority of patients with noninfectious, posterior-segment uveitis do respond to corticosteroids or currently available immunosuppressive agents. In many instances, early, aggressive, and appropriate treatment of intraocular inflammation makes a huge difference as to whether the patient retains or loses vision. The challenge to clinicians is to diagnose the disease condition correctly and early and enable their patients to have access to specialized care. The chronic, relapsing, insidious nature of posterior uveitis demands careful attention by caregivers. As the pathophysiological processes of these conditions become clearer, promising new treatments will be developed that provide more effective and safer treatments for uveitis patients.

Key points

•  Uveitis is a leading cause of visual impairment worldwide. •  Pharmacotherapy is the primary means of treating posterior

uveitis.

•  Aggressive anti-inflammatory therapy is crucial for sight preservation in autoimmune posterior uveitis.

•  Choice of pharmacotherapeutic agent is based on specific disease entity and patients’ clinical profiles.

•  Appropriate drug selection and careful monitoring provide safe, effective treatment.

•  New immunosuppressive drugs and devices provide alternative modalities for drug resistance or drug intolerance.

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Pharmacotherapy to Amenable Diseases Retinal • 3 section

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