Giant Fornix Syndrome (GFS)

Key Points at a Glance

Key Points of This Disease

• A rare chronic inflammatory disease that occurs in elderly individuals (70s to 90s). First reported by Rose in 2004.
• Recurrent purulent conjunctivitis occurs against a background of an abnormally deep upper eyelid fornix (often 2–3 cm).
• The most frequently isolated causative bacterium is Staphylococcus aureus
• Diagnosis is often delayed due to lack of awareness, with an average symptom duration of 2 years before referral or diagnosis
• Management combines medical treatment (antibiotics, fornix irrigation) and surgical treatment (fornix shortening)

1. What is Giant Fornix Syndrome (GFS)?

Giant fornix syndrome (GFS) is a rare chronic inflammatory disease with recurrent purulent conjunctivitis. It was first reported by Geoffrey Rose in 2004 ¹⁾. Rose’s initial case series described 12 patients (10 women) aged 77–93 years, all with deep superior fornices due to age-related disinsertion of the levator aponeurosis, and Staphylococcus aureus was cultured from the coagulum at a high rate ¹⁾. Bilateral cases have also been reported ²⁾.

It occurs in elderly individuals with abnormally deep superior fornices and is characterized by chronic conjunctival discharge and secondary corneal and eyelid lesions.

Epidemiology

• Age of onset: 70s to 90s. Median age is 75 years
• Sex: Multiple case series report a female predominance
• Prevalence: Accurate data are limited due to underdiagnosis. Lack of awareness often leads to missed or delayed diagnosis for years

2. Main Symptoms and Clinical Findings

Subjective Symptoms

The main clinical picture is chronic recurrent purulent conjunctivitis with copious discharge.

• Purulent discharge: Persistent large amounts of mucopurulent discharge
• Hyperemia: Accompanied by conjunctival inflammation and redness
• Pain and irritation: Foreign body sensation, burning sensation, dryness
• Epiphora: Due to impaired tear drainage
• Decreased vision: Occurs when corneal lesions progress

Clinical Findings (Findings Confirmed by Physician Examination)

• Mucopurulent discharge and pseudomembrane: Papillary conjunctivitis on the palpebral conjunctiva, thick pseudomembrane in the fornix
• Abnormally deep superior fornix: Often reaching 2–3 cm. Can be confirmed by lid eversion.
• Ptosis: Secondary to severe superior tarsal conjunctivitis
• Yellow debris clumps: Found within the inflamed superior fornix
• Blepharitis: Redness and telangiectasia of the eyelid margin
• Punctate superficial keratopathy: May be reversible, but can lead to persistent epithelial degeneration
• Corneal complications: In long-standing cases, may lead to neovascularization, stromal scarring, corneal ulceration, and perforation
• CT findings: Free air may be observed in the superior conjunctival fornix

GFS is usually unilateral, but rare bilateral cases have been reported. It typically involves the superior fornix, but involvement of the inferior fornix has also been reported.

Q Is GFS always unilateral?

A

GFS is usually unilateral, but rare bilateral cases have been reported. Although the superior fornix is typically the primary site, cases involving only the inferior fornix have been reported in patients with a history of lower eyelid surgery.

3. Causes and Risk Factors

Risk Factors

• Age: The greatest risk factor. Age-related disinsertion of the levator aponeurosis from the tarsal plate increases the depth of the superior fornix.
• Deep superior sulcus: Commonly seen in GFS patients, with fornix depth reaching 2–3 cm.
• Sex: Case series show a predilection for females.
• Chronic colonization by commensal bacteria: The eyelashes and conjunctival fornix serve as sites of colonization. The most frequently isolated bacterium is Staphylococcus aureus.

Be aware of chronic conjunctivitis in the elderly

If an elderly family member suffers from recurrent eye discharge or redness despite treatment, giant fornix syndrome may be the cause. Because this condition is often underrecognized and diagnosis is delayed, we recommend consulting an ophthalmologist if symptoms persist for a long time.

4. Diagnosis and Examination Methods

Key Points in Diagnosis

The diagnosis of GFS is primarily based on clinical findings. The presence of an abnormally deep superior fornix is supportive. GFS is more likely to occur when fornix depth exceeds 25 mm, but the presence of clinical signs is decisive for diagnosis.

No specific diagnostic criteria or severity grading system has been established. The average duration of symptoms before referral or diagnosis is 2 years, indicating that this condition is frequently overlooked.

Examination Points

• Eyelid eversion: Check for thick pseudomembrane and deep conjunctival fornix.
• Slit-lamp examination: Observe mucopurulent discharge covering the conjunctiva and cornea, papillary conjunctivitis, and punctate superficial keratopathy.
• Lacrimal sac compression: Check for mucus reflux from the punctum.
• Fundus examination: Usually normal.

Tests

• Bacterial culture: Purulent conjunctival discharge shows high bacterial load. Staphylococcus aureus and Staphylococcus epidermidis are most commonly isolated.
• Conjunctival biopsy: Shows intense chronic inflammation with numerous plasma cells and small, well-differentiated lymphocytes with germinal centers.
• CT scan: May show free gas in the superior conjunctival fornix.

Differential Diagnosis

• Ocular allergy: Presents with similar symptoms and may be misdiagnosed, but often associated with atopic diseases such as asthma and dermatitis.
• Chronic dacryocystitis: Involves similar bacteria as GFS. If conjunctivitis does not improve after treatment of dacryocystitis, evaluate for GFS.
• Blepharitis: Common cause of chronic ocular irritation.
• Dry eye: Presents with chronic redness and irritation.
• Episcleritis/Scleritis: Inflammatory diseases causing redness and pain.

5. Standard Treatment

GFS is managed with a combination of medical and surgical treatments, but a complete cure is difficult.

Medical Treatment

• Removal of concretions and fornix irrigation: Reduces bacterial load and improves penetration of topical antibiotics. This is a fundamental step in treatment.
• Topical antibiotics: Staphylococcus aureus is susceptible to penicillins, cephalosporins, and macrolides. If MRSA is suspected, consider vancomycin, trimethoprim-sulfamethoxazole, or tetracyclines. High-dose antibiotics are required for bacteria within fornix concretions; low doses are not successful in eradication.
• 10% povidone-iodine irrigation: Used in refractory cases in combination with antibiotics and steroids. It is known to reduce bacterial colonies on the conjunctival surface by 91%.
• Topical steroids: Added to suppress inflammation.
• Subconjunctival injection and systemic antibiotics: Used in refractory cases.
• Artificial tears: Administered to protect the ocular surface and promote corneal healing.

Surgical Treatment

Considered when symptoms cannot be controlled with medical treatment.

Forniceal reduction has been reported as an effective surgical intervention. It shortens the abnormally deep fornix and corrects the anatomical structure.

Surgical Procedure

1. Resect the palpebral conjunctiva of the upper and/or lower eyelid and remove pseudomembranes.
2. Use electrocautery to resect the underlying inflamed conjunctival bed.
3. Perform subconjunctival injection of antibiotics (e.g., cefazolin, vancomycin).

In a case series of 6 patients, the fornix depth was reduced by an average of 4.75 mm, and all reported postoperative symptom improvement. 5 out of 6 achieved complete resolution. Use of the Putterman clamp improves surgical outcomes.

Eyelid surgery or lacrimal surgery may be combined to improve tear drainage. Preoperative culture of concretions and secretions guides intraoperative and postoperative antibiotic selection.

Points to note in treatment

Medical treatment for GFS requires lifelong long-term management. Considering the risks associated with long-term use of antibiotics and steroids, please discuss the treatment plan thoroughly with your doctor. Even after surgical treatment, there is a possibility of recurrence, so regular follow-up is important.

Q What are the outcomes of fornix shortening surgery?

A

In a case series of 6 patients, the depth of the fornix was reduced by an average of 4.75 mm, and all achieved symptom resolution within 1 month postoperatively. Complete remission was achieved in 5 out of 6 patients, but one experienced recurrence. No surgical complications were reported.

6. Pathophysiology and detailed pathogenesis

Vicious cycle of inflammation and anatomical abnormalities

The exact mechanism of GFS is not fully understood, but the following vicious cycle is considered central to the pathology.

1. Initiation of inflammation by commensal bacteria: Commensal bacteria (mainly Staphylococcus aureus) on the eyelids and conjunctiva cause subclinical or clinical inflammation
2. Secretion of proteinaceous exudate: Proteinaceous exudate is secreted from the inflamed palpebral conjunctiva
3. Formation of coagulum: The exudate forms a coagulum in the abnormally deep superior fornix
4. Bacterial colonization: More bacteria colonize the coagulum, creating a toxic environment on the ocular surface
5. Exacerbation of inflammation: Inflammation increases the rugosity of the fornix surface, leading to further release of proteinaceous exudate and worsening inflammation

Mechanism of increased fornix depth

Age-related disinsertion of the levator aponeurosis from the tarsal plate increases the depth of the superior fornix. Additionally, inflammatory changes in the palpebral conjunctiva also affect the fornix structure.

• Inflammatory changes: Increased rough surface area promotes ptosis
• Prostaglandin action: Prostaglandins released from inflammatory cells of the palpebral conjunctiva cause periorbital lesions with atrophy of surrounding tissues and enophthalmos, further deepening the fornix.
• Tear excretion disorder: Contributes to increased bacterial load and worsening infection risk.

A vicious cycle in which inflammation related to commensal bacteria worsens the existing abnormal fornix structure and creates additional “dead space” that harbors bacterial flora continues to progress the disease.

For patients: Please read this

The treatments and examination methods introduced in this article include information for medical professionals. Please be sure to decide on a treatment plan in consultation with your ophthalmologist. GFS is a relatively new disease concept and may require referral to a specialized facility.

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References

1. Rose GE. The giant fornix syndrome: an unrecognized cause of chronic, relapsing, grossly purulent conjunctivitis. Ophthalmology. 2004;111(8):1539-1545.
2. Commiskey P, Bowers E, Dmitriev A, Mammen A. Bilateral, chronic, bacterial conjunctivitis in giant fornix syndrome. BMJ Case Rep. 2022;15(1):e245460.