Anterior and intermediate uveitis patterns
Key Takeaways
JIA-associated inflammation can be asymptomatic and requires risk-based slit-lamp screening.
Fuchs heterochromia may be absent; cataract and glaucoma often determine visual outcome.
Mild anterior cells with marked pressure elevation suggest a hypertensive uveitis mechanism.
Pars planitis is a defined subset of intermediate uveitis after associated causes are excluded.
A quiet-looking eye can still contain damaging inflammation
Anterior uveitis predominantly involves the anterior chamber; intermediate uveitis predominantly involves the vitreous. The symptom pattern, laterality, course, pressure and associated systemic disease help distinguish causes. Painful acute unilateral attacks associated with HLA-B27 differ from the often asymptomatic chronic anterior inflammation of juvenile idiopathic arthritis (JIA). Absence of redness is not evidence that a child's eye is safe.
Record standardized cell and flare findings, vitreous inflammation, synechiae, lens changes, pressure and macular status. Examine the posterior segment even when the presenting complaint is anterior. Optical coherence tomography helps detect macular oedema that may explain reduced vision more than the visible anterior cells. Investigations should follow the phenotype and history rather than a universal panel of every antibody test.
JIA-associated uveitis
JIA can cause chronic anterior uveitis with few symptoms, particularly in risk groups defined by age, arthritis category, antinuclear antibodies and disease duration. Regular slit-lamp screening is necessary even when the joints are controlled. Screening frequency is risk-based and should follow the relevant paediatric pathway; an annual symptom questionnaire is not an adequate substitute.
Complications include posterior synechiae, band keratopathy, cataract, glaucoma, macular oedema and amblyopia. Topical corticosteroids are commonly used initially, with pressure and lens monitoring. Persistent steroid-dependent or severe inflammation may require systemic steroid-sparing therapy coordinated with paediatric rheumatology. Methotrexate and selected monoclonal anti-TNF agents have an established role. Adalimumab has a European paediatric noninfectious anterior-uveitis indication from age two in the specified treatment setting; use the actual product information rather than extrapolating adult doses to children.
Assess visual development and refractive error alongside inflammatory control. A child may need amblyopia treatment after the media clear. Surgery for cataract or glaucoma requires coordinated control of inflammation and realistic discussion of recurrence and complications. Do not repeatedly escalate drops while ignoring adherence, steroid toxicity and the need for systemic treatment.
Fuchs and hypertensive anterior inflammation
Fuchs uveitis syndrome often has chronic low-grade anterior inflammation, diffuse small stellate keratic precipitates, vitreous cells and iris stromal change. Heterochromia can be subtle or absent, especially with similar iris pigmentation. Posterior synechiae are generally absent. Cataract and glaucoma are important causes of visual loss. Routine prolonged topical steroid treatment for every mild stable case can add harm; manage complications and reassess atypical findings.
Posner–Schlossman syndrome describes recurrent mild anterior inflammation with disproportionate pressure elevation. Cytomegalovirus is implicated in a subset of hypertensive anterior uveitis, and aqueous testing may be useful in selected cases. Differentiate herpes-associated disease, steroid response and ordinary glaucoma. Treat the acute pressure and inflammation, and address a demonstrated viral cause when appropriate. Recurrent attacks can still damage the nerve despite their apparently mild inflammatory appearance.
| Pattern | Useful discriminators | Major management concern |
|---|---|---|
| HLA-B27-associated | Acute recurrent attacks, often symptomatic | Inflammation and associated systemic disease |
| JIA-associated | Chronic, potentially asymptomatic childhood disease | Screening, complications and steroid-sparing care |
| Fuchs | Diffuse stellate deposits, iris change, usually no synechiae | Cataract and glaucoma |
| Hypertensive viral pattern | High pressure, mild cells, characteristic iris or endothelial changes | Viral assessment and pressure damage |
Intermediate disease and pars planitis
Patients may report floaters and blurred vision with little pain. Vitreous cells, snowballs and inferior pars plana snowbanking support an intermediate pattern. Pars planitis is an intermediate uveitis with snowballs or snowbanks without an associated infection or systemic disease; it should not be used as a synonym for every intermediate uveitis.
Consider multiple sclerosis, sarcoidosis and infection according to the history and findings. Neurological symptoms or a relevant phenotype may justify MRI and neurological assessment. A positive unrelated screening test should not displace careful anatomical classification. Macular oedema, cataract, glaucoma, vitreous haemorrhage and tractional complications can affect vision.
Treatment intensity follows inflammatory activity and threat to vision. Observation may fit mild inactive disease without complications. Local or systemic corticosteroids, steroid-sparing therapy and selected surgery are used for more significant disease after infectious causes are addressed. When considering anti-TNF treatment, assess demyelinating disease risk and coordinate specialist decisions.
Directed case answer
A child with JIA and no ocular complaints still needs slit-lamp screening. An adult with a quiet-looking eye, pressure of 42 mmHg and mild anterior cells needs a hypertensive uveitis differential rather than reassurance. A patient with floaters, snowballs and macular oedema requires intermediate-uveitis assessment, including the distinction between pars planitis and disease associated with a systemic cause.
Sources: ACR JIA-uveitis guideline and EMA Humira information.
Sections you finish are checked off in the contents.