SUN II Classification of Uveitides
All content on Eyewiki is protected by copyright law and the Terms of Service. This content may not be reproduced, copied, or put into any artificial intelligence program, including large language and generative AI models, without permission from the Academy.
Uveitis Overview
The uveitides are a collection of diseases characterized by uveal inflammation.[1] Together, these diseases constitute the fifth leading cause of blindness in the developed world.[2] Classes of uveitis are typically divided anatomically, based on where inflammation occurs (i.e., anterior uveitis, intermediate uveitis, posterior uveitis, and panuveitis).[3] However, uveitis affecting a given anatomic location may have distinct etiologies, clinical courses, prognoses, and treatment indications. Although there are specified clinical diagnostic criteria for several of the uveitides, prior to 2021 there was no validated systemic approach for classification of individual uveitides. Agreement between experts on specific cases is moderate at best.[4] These incongruities have resulted in a lack of uniformity of reporting in the ophthalmic literature.
SUN II Classification Study Overview
In 2021, the Standardization of Uveitis Nomenclature (SUN) Working Group published a paper in the American Journal of Ophthalmology titled “Development of Classification Criteria for the Uveitides”, describing their work to develop classification criteria for the 25 most common uveitides. The objective of the study was to establish a uniform group of patients for inclusion in research studies and to maximize the probability that all study participants will be widely accepted as having the disease.[5] Notably, classification criteria are intended primarily for research and differ from diagnostic criteria in that classification criteria emphasize statistical specificity, whereas diagnostic criteria emphasize sensitivity. As such, patients in the clinic may be classified clinically as having a specific type of uveitis, even though they do not meet the SUN II criteria for that uveitis type. Additional papers in the same journal issue described the specific classification criteria for each uveitis entity listed in Table 1 below:
Anatomic Class | Infectious | Systemic Disease Associated | Eye-Limited |
---|---|---|---|
Anterior | Cytomegalovirus anterior uveitis | Juvenile idiopathic arthritis–associated anterior uveitis | Fuchs uveitis syndrome |
Herpes simplex virus anterior uveitis | Spondyloarthritis/HLA-B27-associated anterior uveitis | ||
Varicella zoster virus anterior uveitis | Tubulointerstitial nephritis with uveitis | ||
Syphilitic anterior uveitis | Sarcoidosis-associated anterior uveitis | ||
Intermediate | Syphilitic intermediate uveitis | Multiple sclerosis–associated intermediate uveitis | Pars planitis |
Sarcoidosis-associated intermediate uveitis | Intermediate uveitis, non–pars planitis type | ||
Posterior | Acute retinal necrosis | Sarcoidosis-associated posterior uveitits | Acute posterior multifocal placoid pigment epitheliopathy |
Cytomegalovirus retinitis | Birdshot chorioretinitis | ||
Syphilitic posterior uveitis | Multiple evanescent white dot syndrome | ||
Toxoplasmic retinitis | Multifocal choroiditis with panuveitis | ||
Tuberculous posterior uveitis | Punctate inner choroiditis | ||
Serpiginous choroiditis | |||
Panuveitis | Syphilitic panuveitis | Behçet disease uveitis | Sympathetic ophthalmia |
Tuberculous panuveitis | |||
Sarcoidosis-associated panuveitis | |||
Vogt-Koyanagi-Harada disease (early-stage and late-stage) |
Methods and Results
The study developed the classification criteria in 4 phases: 1) informatics; 2) case collection; 3) case selection; 4) machine learning. The informatics phase standardized language to describe each uveitis type and mapped terms to individual diseases. During the case collection phase, the team input 5,766 cases into a database, averaging 100-250 cases for each uveitis type. In the case selection phase, uveitis experts actively reviewed the cases, using formal consensus to determine if they indicated a specific identifiable disease. Cases with supermajority agreement (>75%) among experts were input into the final database, totaling 4,046 cases. Machine learning techniques (multinomial logistic regression with lasso regularization) were used to establish a set of distinguishing criteria among a subset of cases (the “training set” ~85% of cases) and validate these criteria with a second subset of cases (“the validation set” ~15% of cases).
The overall accuracy estimates for each uveitic class (e.g. anterior, intermediate, etc.) are depicted in Table 2. Tables 3 through 6 contain the classification and exclusion criteria, as well as the misclassification rate (the proportion of cases in the validation set classified incorrectly by the machine learning algorithm when compared to the consensus diagnosis) for the specific anterior, intermediate, posterior, and pan-uveitis entities.
Uveitic class | Number of diseases | Accuracy (%) | 95% Confidence Interval |
---|---|---|---|
Anterior uveitides | 9 | 96.7 | 92.4-98.6 |
Intermediate uveitides | 5 | 99.3 | 96.1-99.9 |
Posterior uveitides | 9 | 98.0 | 94.3-99.3 |
Panuveitides | 7 | 94.0 | 89.0-96.8 |
Infectious posterior/panuveitides | 5 | 93.3 | 89.1-96.3 |
SUN II Classification of Uveitides
Anterior Uveitides
Name | Etiology | Classification Criteria | Exclusion Criteria | Misclassification rate training set (%) | Misclassification rate validation set (%) |
---|---|---|---|---|---|
Cytomegalovirus anterior uveitis[7] | Infectious |
AND
|
|
1.3 | 0.0 |
Herpes simplex virus anterior uveitis[6] |
AND
|
|
8.3% | 17% | |
Varicella Zoster Virus Anterior Uveitis[8] |
AND
AND
a. aqueous humor PCR positive for varicella zoster virus OR b. sectoral iris atrophy in a patient ≥ 60 years of age OR c. concurrent or recent dermatomal Herpes zoster |
|
0.9 | 0 | |
Syphilitic anterior uveitis[9] |
AND
|
|
0 | 0 | |
Juvenile idiopathic arthritis-associated chronic anterior uveitis[10] | Systemic disease associated |
AND
AND
|
|
2.4 | 0 |
Spondyloarthritis/HLAB27-associated anterior uveitis[12] |
AND either both #2 and #3 OR #4
OR 3. Chronic uveitis with both ASAS-defined spondyloarthritis (axial or peripheral) AND HLA-B27-positive |
|
0 | 3.6 | |
Tubulointerstitial nephritis with uveitis[13] |
AND
|
|
1.2 | 0 | |
Sarcoidosis-associated anterior uveitis[14] |
AND
|
|
3.2 | 0 | |
Fuchs uveitis syndrome[15] | Eye-limited |
AND
AND
AND
|
|
4.7 | 5.5 |
Intermediate Uveitides
Name | Etiology | Classification Criteria | Exclusion Criteria | Misclassification rate training set (%) | Misclassification rate validation set (%) |
---|---|---|---|---|---|
Syphilitic intermediate uveitis[9] | Infectious |
AND
|
|
6.0 | 0 |
Multiple sclerosis–associated intermediate uveitis[17] | Systemic disease associated |
AND
|
|
0 | 0 |
Sarcoidosis-associated intermediate uveitis[14] |
AND
|
|
2.6 | 0 | |
Pars planitis[18] | Eye-limited |
AND
|
|
0 | 1.7 |
Intermediate uveitis, non–pars planitis type[19] |
AND
|
|
0 | 0 |
Posterior Uveitides
Name | Etiology | Classification Criteria | Exclusion Criteria | Misclassification rate training set (%) | Misclassification rate validation set (%) |
---|---|---|---|---|---|
Acute retinal necrosis[21] | Infectious |
3. Characteristic clinical picture:
|
|
15 | 11.5 |
Cytomegalovirus retinitis[22] |
AND
AND (#A or #B) A. Characteristic clinical picture ([1 or 2 or 3] and 4)
OR B. Evidence of intraocular infection with cytomegalovirus
|
|
6.9 | 6.3 | |
Syphilitic posterior uveitis[9] |
AND
|
|
0 | 0 | |
Toxoplasmic retinitis[23] |
OR
|
|
8.2 | 10 | |
Tubercular posterior uveitis[24] |
AND
|
|
3.4
*Overall misclassification rate for tubercular uveitis. |
3.6
*Overall misclassification rate for tubercular uveitis. | |
Sarcoidosis-associated posterior uveitis[14] | Systemic-disease associated |
AND
|
|
N/A | N/A |
Acute posterior multifocal placoid pigment epitheliopathy (APMPEE)[25] | Eye-limited | Paucifocal or multifocal choroidal lesions on clinical examination with:
AND
|
|
5 | 0 |
Birdshot chorioretinitis[26] | [#’s 1, 2, and 3] OR # 4
|
|
10 | 0 | |
Multiple evanescent white dot syndrome (MEWDS)[27] |
Characteristic fluorescein angiogram or optical coherence tomogram (OCT)
Absent to mild anterior chamber and vitreous inflammation |
|
7 | 0 | |
Multifocal choroiditis with panuveitis (MFCPU)[28]
* |
AND
AND
|
|
15 | 0 | |
Punctate inner choroiditis (PIC)[29]
* |
AND
AND
|
|
15 | 9 | |
Serpiginous choroiditis[30] |
AND
AND
|
|
0 | 0 | |
*Some researchers consider MFCPU and PIC as variants due to their rare co-occurrence, similar imaging appearance, and shared features, while others note distinctions in morphology and clinical course. A cluster analysis of the two diseases identified two distinct groups based on inflammation and lesion location: anterior chamber and virtuous inflammation are largely absent in PIC and lesion location tends to be posterior in PIC and peripheral in MFCPU.[31] Histologic evaluations suggest differences, but genetic studies indicate possible similarities in pathogenesis. Despite some overlap, the SUN Working Group chooses to define PIC and MFCPU separately, acknowledging occasional cases with mixed features. |
Panuveitides
Name | Etiology | Classification Criteria | Exclusion Criteria | Misclassification rate training set (%) | Misclassification rate validation set (%) |
---|---|---|---|---|---|
Syphilitic panuveitis[9] |
AND
|
|
0 | 0 | |
Tubercular panuveitis[24] |
AND
|
|
3.4
*Overall misclassification rate for tubercular uveitis. |
3.6
*Overall misclassification rate for tubercular uveitis. | |
Behçet disease uveitis[34] |
AND
|
|
0.6 | 0 | |
Sarcoidosis-associated panuveitis[14] |
AND
|
|
1.2 | 0 | |
Early-Stage Vogt-Koyanagi-Harada Disease[32] |
|
Diagnosis requires #1 or #2 AND #3
|
|
8.0 | 7.7 |
Late-Stage Vogt-Koyanagi-Harada Disease[32] |
a. Vitiligo b. Poliosis c. Alopecia |
|
1.0 | 12 | |
Sympathetic ophthalmia[33] | Eye-limited |
|
1. Serology test positive for syphilis, using a treponemal test
2. Evidence for sarcoidosis, either bilateral hilar adenopathy on chest imaging or tissue biopsy demonstrating non-caseating granulomata |
4.2 | 6.7 |
References
- ↑ Jabs DA, Busingye J. Approach to the diagnosis of the uveitides. Am J Ophthalmol. Aug 2013;156(2):228-36. doi:10.1016/j.ajo.2013.03.027
- ↑ Nussenblatt RB. The natural history of uveitis. Int Ophthalmol. Oct 1990;14(5-6):303-8. doi:10.1007/BF00163549
- ↑ Jabs DA, Nussenblatt RB, Rosenbaum JT, Group SoUNSW. Standardization of uveitis nomenclature for reporting clinical data. Results of the First International Workshop. Am J Ophthalmol. Sep 2005;140(3):509-16. doi:10.1016/j.ajo.2005.03.057
- ↑ Jabs DA, Dick A, Doucette JT, et al. Interobserver Agreement Among Uveitis Experts on Uveitic Diagnoses: The Standardization of Uveitis Nomenclature Experience. Am J Ophthalmol. Feb 2018;186:19-24. doi:10.1016/j.ajo.2017.10.028
- ↑ 5.0 5.1 5.2 Group SoUNSW. Development of Classification Criteria for the Uveitides. Am J Ophthalmol. Aug 2021;228:96-105. doi:10.1016/j.ajo.2021.03.061
- ↑ 6.0 6.1 Group SoUNSW. Classification Criteria for Herpes Simplex Virus Anterior Uveitis. Am J Ophthalmol. Aug 2021;228:231-236. doi:10.1016/j.ajo.2021.03.053
- ↑ 7.0 7.1 Group SoUNSW. Classification Criteria for Cytomegalovirus Anterior Uveitis. Am J Ophthalmol. Aug 2021;228:89-95. doi:10.1016/j.ajo.2021.03.060
- ↑ 8.0 8.1 Group SoUNSW. Classification Criteria for Varicella Zoster Virus Anterior Uveitis. Am J Ophthalmol. Aug 2021;228:165-173. doi:10.1016/j.ajo.2021.03.037
- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 Group SoUNSW. Classification Criteria for Syphilitic Uveitis. Am J Ophthalmol. Aug 2021;228:182-191. doi:10.1016/j.ajo.2021.03.039
- ↑ 10.0 10.1 Group SoUNSW. Classification Criteria for Juvenile Idiopathic Arthritis-Associated Chronic Anterior Uveitis. Am J Ophthalmol. Aug 2021;228:192-197. doi:10.1016/j.ajo.2021.03.055
- ↑ 11.0 11.1 Aggarwal A, Misra DP. Enthesitis-related arthritis. Clin Rheumatol. Nov 2015;34(11):1839-46. doi:10.1007/s10067-015-3029-4
- ↑ 12.0 12.1 Group SoUNSW. Classification Criteria for Spondyloarthritis/HLA-B27-Associated Anterior Uveitis. Am J Ophthalmol. Aug 2021;228:117-125. doi:10.1016/j.ajo.2021.03.049
- ↑ 13.0 13.1 Group SoUNSW. Classification Criteria for Tubulointerstitial Nephritis With Uveitis Syndrome. Am J Ophthalmol. Aug 2021;228:255-261. doi:10.1016/j.ajo.2021.03.041
- ↑ 14.0 14.1 14.2 14.3 14.4 14.5 14.6 Group SoUNSW. Classification Criteria for Sarcoidosis-Associated Uveitis. Am J Ophthalmol. Aug 2021;228:220-230. doi:10.1016/j.ajo.2021.03.047
- ↑ 15.0 15.1 Group SoUNSW. Classification Criteria for Fuchs Uveitis Syndrome. Am J Ophthalmol. Aug 2021;228:262-267. doi:10.1016/j.ajo.2021.03.052
- ↑ 16.0 16.1 16.2 16.3 Prevention CDCa. Syphilis. 2015 Sexually Transmitted Diseases Treatment Guidelines. Available at cdc gov Accessed April. 2019;11
- ↑ 17.0 17.1 Group SoUNSW. Classification Criteria for Multiple Sclerosis-Associated Intermediate Uveitis. Am J Ophthalmol. Aug 2021;228:72-79. doi:10.1016/j.ajo.2021.03.044
- ↑ 18.0 18.1 Group SoUNSW. Classification Criteria For Pars Planitis. Am J Ophthalmol. Aug 2021;228:268-274. doi:10.1016/j.ajo.2021.03.045
- ↑ 19.0 19.1 Group SoUNSW. Classification Criteria for Intermediate Uveitis, Non-Pars Planitis Type. Am J Ophthalmol. Aug 2021;228:159-164. doi:10.1016/j.ajo.2021.03.054
- ↑ 20.0 20.1 Thompson AJ, Banwell BL, Barkhof F, et al. Diagnosis of multiple sclerosis: 2017 revisions of the McDonald criteria. The Lancet Neurology. 2018;17(2):162-173.
- ↑ 21.0 21.1 Group SoUNSW. Classification Criteria for Acute Retinal Necrosis Syndrome. Am J Ophthalmol. Aug 2021;228:237-244. doi:10.1016/j.ajo.2021.03.057
- ↑ 22.0 22.1 Group SoUNSW. Classification Criteria for Cytomegalovirus Retinitis. Am J Ophthalmol. Aug 2021;228:245-254. doi:10.1016/j.ajo.2021.03.051
- ↑ 23.0 23.1 Group SoUNSW. Classification Criteria for Toxoplasmic Retinitis. Am J Ophthalmol. Aug 2021;228:134-141. doi:10.1016/j.ajo.2021.03.042
- ↑ 24.0 24.1 24.2 24.3 Group SoUNSW. Classification Criteria for Tubercular Uveitis. Am J Ophthalmol. Aug 2021;228:142-151. doi:10.1016/j.ajo.2021.03.040
- ↑ 25.0 25.1 Group SoUNSW. Classification Criteria for Acute Posterior Multifocal Placoid Pigment Epitheliopathy. Am J Ophthalmol. Aug 2021;228:174-181. doi:10.1016/j.ajo.2021.03.056
- ↑ 26.0 26.1 Group SoUNSW. Classification Criteria for Birdshot Chorioretinitis. Am J Ophthalmol. Aug 2021;228:65-71. doi:10.1016/j.ajo.2021.03.059
- ↑ 27.0 27.1 Group SoUNSW. Classification Criteria For Multiple Evanescent White Dot Syndrome. Am J Ophthalmol. Aug 2021;228:198-204. doi:10.1016/j.ajo.2021.03.050
- ↑ 28.0 28.1 Group SoUNSW. Classification Criteria for Multifocal Choroiditis With Panuveitis. Am J Ophthalmol. Aug 2021;228:152-158. doi:10.1016/j.ajo.2021.03.043
- ↑ 29.0 29.1 Group SoUNSW. Classification Criteria for Punctate Inner Choroiditis. Am J Ophthalmol. Aug 2021;228:275-280. doi:10.1016/j.ajo.2021.03.046
- ↑ 30.0 30.1 Group SoUNSW. Classification Criteria for Serpiginous Choroiditis. Am J Ophthalmol. Aug 2021;228:126-133. doi:10.1016/j.ajo.2021.03.038
- ↑ Gilbert RM, Niederer RL, Kramer M, et al. Differentiating Multifocal Choroiditis and Punctate Inner Choroidopathy: A Cluster Analysis Approach. Am J Ophthalmol. May 2020;213:244-251. doi:10.1016/j.ajo.2020.01.031
- ↑ 32.0 32.1 32.2 Group SoUNSW. Classification Criteria for Vogt-Koyanagi-Harada Disease. Am J Ophthalmol. Aug 2021;228:205-211. doi:10.1016/j.ajo.2021.03.036
- ↑ 33.0 33.1 Group SoUNSW. Classification Criteria for Sympathetic Ophthalmia. Am J Ophthalmol. Aug 2021;228:212-219. doi:10.1016/j.ajo.2021.03.048
- ↑ Group SoUNSW. Classification Criteria for Behçet Disease Uveitis. Am J Ophthalmol. Aug 2021;228:80-88. doi:10.1016/j.ajo.2021.03.058
- ↑ Disease ISGfBs. Criteria for diagnosis of Behçet's disease. Lancet. 1990;335(8697):1078-1080.