Which pattern of scleritis is both the most common and generally the most benign?

Diffuse anterior scleritis Anterior scleritis is the most common form overall, and within it the diffuse pattern of widespread scleral inflammation and redness is both the commonest and generally the most benign.

Necrotizing anterior scleritis with inflammation

Which pattern of scleritis presents with discrete, immobile, tender scleral nodules?

Nodular anterior scleritis Nodular anterior scleritis is defined by one or more discrete, immobile, tender nodules of scleral inflammation.

Scleromalacia perforans is seen almost exclusively with which systemic disease?

Long-standing rheumatoid arthritis Necrotizing scleritis without inflammation, or scleromalacia perforans, is a painless variant seen almost exclusively in long-standing rheumatoid arthritis, with progressive scleral thinning.

Granulomatosis with polyangiitis

Why is posterior scleritis frequently underdiagnosed?

The eye can look white and quiet externally Posterior scleritis involves sclera behind the equator, so the eye may look relatively white and quiet while significant inflammation and pain are present.

It causes no ocular pain at any stage

It produces only transient blurring of vision

It resolves before the patient can be examined

The T-sign seen on B-scan ultrasonography in posterior scleritis is produced by what?

Fluid in the sub-Tenon space B-scan in posterior scleritis shows scleral and episcleral thickening, sometimes with the characteristic T-sign caused by fluid in the sub-Tenon space.

Vitreous haemorrhage layering behind the lens

Blood within the suprachoroidal space

Calcification at the optic nerve head

ANCA testing in a patient with scleritis is directed particularly at which diagnosis?

Granulomatosis with polyangiitis ANCA testing is included in the scleritis workup particularly when granulomatosis with polyangiitis is suspected, since it is strongly linked to necrotizing scleritis.

What treatment does necrotizing scleritis typically require?

Topical corticosteroid drops used alone

Oral NSAIDs as sole monotherapy

Observation with analgesia until it settles

Infectious scleritis from herpes zoster, tuberculosis or syphilis is especially relevant in which setting?

After ocular surgery or trauma Infectious causes of scleritis, including herpes zoster, tuberculosis and syphilis, are listed as particularly relevant after ocular surgery or trauma.

In children under five years of age

During the third trimester of pregnancy

Necrotizing scleritis with associated systemic vasculitis carries which added risk?

Increased mortality if the systemic disease is undertreated Besides scleral perforation and vision loss, necrotizing scleritis with systemic vasculitis carries increased mortality when the underlying systemic disease is not adequately treated.

Permanent pharmacological mydriasis

Corneal endothelial decompensation

Chronic angle closure from lens swelling

Scleritis Classification: Types & Systemic Workup

Scleritis classification into anatomical location and inflammatory pattern is not just descriptive labeling; the specific type of scleritis a patient has strongly predicts both the likelihood of finding an associated systemic autoimmune disease and the risk of vision-threatening complications, which is why the classification shapes the workup from the very first visit.

Anterior Scleritis

Anterior scleritis is the most common form and is subdivided by clinical appearance.

Diffuse anterior scleritis: widespread scleral inflammation and redness, the most common and generally the most benign pattern
Nodular anterior scleritis: one or more discrete, immobile, tender nodules of scleral inflammation
Necrotizing anterior scleritis with inflammation: the most severe and destructive pattern, with thinning and potential perforation of the sclera, strongly associated with systemic autoimmune disease
Necrotizing anterior scleritis without inflammation (scleromalacia perforans): a distinct, painless variant seen almost exclusively in long-standing rheumatoid arthritis, where scleral thinning progresses with little apparent inflammation, sometimes to the point of visible uveal show through the thinned sclera (see scleromalacia perforans)

Posterior Scleritis

Posterior scleritis involves the sclera behind the equator and is more likely to be missed clinically, since the eye can look relatively white and quiet externally while significant inflammation and pain are present.

Pain, sometimes severe, out of proportion to external findings
Proptosis, restricted motility, and choroidal folds or exudative retinal detachment from posterior involvement
B-scan ultrasonography showing scleral and episcleral thickening, sometimes with a characteristic “T-sign” from fluid in the sub-Tenon space

Posterior scleritis is frequently underdiagnosed because of the deceptively quiet external appearance, and it should be considered in any patient with unexplained ocular pain, especially with proptosis or restricted movement (see posterior scleritis).

Test your knowledge 10 questions from this article

Why the Pattern Matters for the Workup

Necrotizing scleritis, whether anterior with inflammation or the painless scleromalacia perforans variant, carries the strongest association with systemic autoimmune disease and the highest risk of ocular and even life-threatening systemic complications, and it warrants the most thorough and urgent systemic evaluation.

Diffuse and nodular anterior scleritis are more often idiopathic but still carry a meaningful minority risk of systemic association and deserve at least a baseline autoimmune and infectious screen.

Systemic Associations

Rheumatoid arthritis, one of the most common associations, particularly with necrotizing disease and scleromalacia perforans
Granulomatosis with polyangiitis, strongly linked to necrotizing scleritis and requiring urgent recognition given its potential severity (see granulomatosis with polyangiitis)
Relapsing polychondritis
Systemic lupus erythematosus and other connective tissue diseases
Infectious causes, including herpes zoster, tuberculosis, and syphilis, particularly relevant after ocular surgery or trauma
Gout, though less common as a cause of true scleritis

Workup

Complete blood count, inflammatory markers (ESR, CRP)
Rheumatoid factor and anti-CCP antibodies
ANCA testing, particularly for suspected granulomatosis with polyangiitis
ANA and other lupus-related serology when indicated
Syphilis and tuberculosis testing, especially with atypical or necrotizing presentations
Chest imaging when systemic vasculitis or sarcoidosis is suspected

The extent of workup is tailored to the clinical pattern: a mild first episode of diffuse anterior scleritis in an otherwise healthy patient may warrant a more limited initial screen, while necrotizing disease warrants prompt, thorough systemic evaluation.

Management Implications by Type

Diffuse and nodular scleritis often respond to oral NSAIDs or systemic corticosteroids, while necrotizing scleritis typically requires systemic corticosteroids together with steroid-sparing immunosuppression, coordinated with rheumatology given the strong systemic disease association (see necrotizing scleritis).

Prognosis

Diffuse and nodular anterior scleritis generally carry a favorable ocular prognosis with appropriate treatment.

Necrotizing scleritis carries a real risk of scleral perforation, vision loss, and, when associated with systemic vasculitis, increased mortality if the underlying systemic disease is not adequately treated, which is the central reason classification is not just an academic exercise.

References

Watson PG, Hayreh SS. Scleritis and episcleritis. Br J Ophthalmol. 1976;60:163-191.
Sainz de la Maza M, Foster CS, Jabbur NS. Scleritis associated with systemic vasculitic diseases. Ophthalmology. 1995;102:687-692.
Wieringa WG, Wieringa JE, ten Dam-van Loon NH, Los LI. Visual outcome, treatment results, and prognostic factors in patients with scleritis. Ophthalmology. 2013;120:379-386.
Akpek EK, Thorne JE, Qazi FA, Do DV, Jabs DA. Evaluation of patients with scleritis for systemic disease. Ophthalmology. 2004;111:501-506.

Test yourself

A few questions straight from this article.

1 / 10 0 correct

Which pattern of scleritis is both the most common and generally the most benign?
Anterior scleritis is the most common form overall, and within it the diffuse pattern of widespread scleral inflammation and redness is both the commonest and generally the most benign.
Which pattern of scleritis presents with discrete, immobile, tender scleral nodules?
Nodular anterior scleritis is defined by one or more discrete, immobile, tender nodules of scleral inflammation.
Scleromalacia perforans is seen almost exclusively with which systemic disease?
Necrotizing scleritis without inflammation, or scleromalacia perforans, is a painless variant seen almost exclusively in long-standing rheumatoid arthritis, with progressive scleral thinning.
Why is posterior scleritis frequently underdiagnosed?
Posterior scleritis involves sclera behind the equator, so the eye may look relatively white and quiet while significant inflammation and pain are present.
The T-sign seen on B-scan ultrasonography in posterior scleritis is produced by what?
B-scan in posterior scleritis shows scleral and episcleral thickening, sometimes with the characteristic T-sign caused by fluid in the sub-Tenon space.
Which scleritis pattern carries the strongest association with systemic autoimmune disease?
Necrotizing scleritis, whether anterior with inflammation or the painless scleromalacia perforans variant, carries the strongest systemic autoimmune association and warrants the most urgent systemic evaluation.
ANCA testing in a patient with scleritis is directed particularly at which diagnosis?
ANCA testing is included in the scleritis workup particularly when granulomatosis with polyangiitis is suspected, since it is strongly linked to necrotizing scleritis.
What treatment does necrotizing scleritis typically require?
Necrotizing scleritis typically needs systemic corticosteroids together with steroid-sparing immunosuppression, coordinated with rheumatology because of the strong systemic disease association.
Infectious scleritis from herpes zoster, tuberculosis or syphilis is especially relevant in which setting?
Infectious causes of scleritis, including herpes zoster, tuberculosis and syphilis, are listed as particularly relevant after ocular surgery or trauma.
Necrotizing scleritis with associated systemic vasculitis carries which added risk?
Besides scleral perforation and vision loss, necrotizing scleritis with systemic vasculitis carries increased mortality when the underlying systemic disease is not adequately treated.