Major reviewImmunopathology of the Noninfectious Posterior and Intermediate Uveitides☆
Section snippets
Mechanisms of Immune Disease
Overall, it is believed that an initiating stimulus triggers immune disease, and that once initiated, the cellular and molecular interactions between subsets of T lymphocytes determine the clinical course. Moreover, it is also likely that both environmental and genetic factors modify disease susceptibility and expression. The association, at least in some patients, between the inheritied immunoregulatory molecules, the human lymphocyte antigens (HLA) and uveitis, and the clinical use of
Sympathetic ophthalmia
Sympathetic ophthalmia (SO) is a bilateral inflammatory disease that occurs following penetrating trauma to one eye.277, 393 Incidence rates of 0.19% and 0.07% have been reported for accidental or surgical trauma, respectively, and occasional reports suggest that sympathetic ophthalmia can follow nonpenetrating trauma to uveal tissue by cryotherapy, laser cycloablation, or radioactive plaque therapy.84, 191, 192, 215, 226, 391 The onset may occur between 5 days and 66 years following trauma,
Summary
Often grouped together under the collective terms posterior uveitis and intermediate uveitis, it is clear that the uveitides discussed in this review all share an underlying immune etiology, yet can be clinically and immunopathologicially distinguished. Recognized differences include the inciting stimulus, the nature of the suspected antigen, the immune cell repertoire most notably the predominant T lymphocyte subset, the types of cytokines produced by these cells, and the subsequent cascade of
Conclusion and Future Directions
In summary, each of the noninfectious posterior and intermediate uveitides may result from an immunogenetic predisposition to disease and development of an inappropriately directed immune response. Traumatic presentation of a self-antigen, or exposure to a self-similar antigen may trigger inflammation. Activation of T lymphocytes and the cytokines they produce then determine the nature of the ensuing response; once initiated, ongoing antigen presentation and epitope spreading increase its
Method of Literature Search
Literature selection for this article was based initially on a MEDLINE search using the following keywords: human, uveitis, posterior, SO, VKH, Behçet's, sarcoid, intermediate uveitis, pars planitis, white dot, birdshot, pathology, immune, immunology, lymphocyte, cytokine, and antibodies. References were also obtained from major textbooks including, among others, Nussenblatt, Uveitis: Fundamentals and Clinical Practice, Mosby 1996, and Albert and Jakobiec, Principles and Practice of
Outline
I. Mechanisms of immune disease
II. The posterior and intermediate uveitides
A. Sympathetic ophthalmia
1. Clinical observations
2. Histology
3. Immunopathology
4. Nonocular investigations
5. Theories of pathogenesis
B. Vogt–Koyanagi–Harada Syndrome
1. Immunogenetics
2. Clinical observations
3. Histology
4. Immunopathology
5. Nonocular investigations
6. Theories of pathogenesis
C. Behçet's disease
1. Immunogenetics
2. Clinical observations
3. Histology
4. Immunopathology
5. Nonocular investigations
6. Theories of
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The authors have no commercial or proprietary interest in any concept or product discussed in this article