Stickler Syndrome

Key Points at a Glance

Highlights of This Disease

• Stickler syndrome is a hereditary connective tissue disorder caused by mutations in collagen genes (mainly COL2A1).
• It often presents with high myopia and a high risk of retinal detachment at a young age.
• Prophylactic 360-degree laser photocoagulation is effective in reducing the risk of retinal detachment (incidence 8.3% vs. untreated 53.6%).
• Cataracts and glaucoma are also frequently associated, requiring long-term ophthalmologic follow-up.
• In addition to ocular symptoms, systemic complications include cleft palate, Pierre Robin sequence, and hearing loss.
• Genotype (COL2A1 vs. COL11A1, etc.) influences clinical presentation and severity.
• Early diagnosis and prophylactic treatment may prevent severe visual impairment.

1. What is Stickler Syndrome?

Stickler syndrome is a hereditary connective tissue disorder first reported by Gunnar Stickler in 1965 ¹⁾. Mutations in collagen genes cause abnormalities in multiple organs including the eyes, joints, face, and hearing.

The most representative causative gene is COL2A1 ³⁾. The prevalence is estimated at 1 in 7,500 to 9,000 people, and although it is a relatively rare disease, it is clinically important as a major cause of retinal detachment at a young age.

Type 1 (COL2A1)

Causative gene: COL2A1 (type II collagen)

Inheritance pattern: Autosomal dominant

Features: Typical type. Membranous vitreous phenotype. High risk of retinal detachment.

Type 2 (COL11A1)

Causative gene: COL11A1 (type 11 collagen alpha 1 chain)

Inheritance: Autosomal dominant

Features: Also called Marshall-Stickler syndrome. Pay attention to structural abnormalities of the lens and vitreous.

Type 3 (COL11A2)

Causative gene: COL11A2 (type 11 collagen alpha 2 chain)

Inheritance: Autosomal dominant

Features: Non-ocular type without eye symptoms. Mainly hearing loss and joint symptoms.

Ocular-limited type / Recessive type

Causative genes: COL2A1 (specific mutations), COL9A1-3

Inheritance: COL9A1-3 are autosomal recessive³⁾

Features: Type with only eye symptoms and no systemic symptoms, or recessive inheritance type.

Q Is Stickler syndrome hereditary?

A

Most cases are autosomal dominant, with a 50% chance of inheritance from parent to child. Recessive types due to COL9A1-3 also exist³⁾. Genetic testing should be considered if there is a family history of retinal detachment or high myopia.

2. Main Symptoms and Clinical Findings

Subjective Symptoms

• Decreased vision/blurring: Decreased vision due to high myopia or cataracts occurs from early childhood.
• Floaters and photopsia: Appear with retinal tears or vitreous degeneration. Photopsia is important as a precursor to retinal detachment.
• Visual field defects and sudden vision loss: Main complaints at the onset of retinal detachment. Immediate medical attention is required.
• Hearing loss: Sensorineural hearing loss may coexist, sometimes with tinnitus.

Clinical Findings

The main ophthalmic findings and their frequencies are shown below.

Finding	Frequency
High myopia (≥ -6 D)	High frequency3)
Retinal detachment	Major lifetime risk3)
Cataract	May coexist3)
Glaucoma	Can also occur in pediatric cases4)

• Vitreous abnormalities: Membranous or fibrous vitreous structures. Absence of the posterior precortical vitreous pocket (PPVP) is a characteristic finding¹⁾. Vitreous degeneration on the posterior lens surface may suggest type II collagen gene mutation. With vitreous liquefaction, degenerated vitreous may be observed as condensed membranous tissue (veil-like degeneration) on the retinal surface.
• Macular chorioretinal atrophy: Macular atrophy lesions reflecting Bruch membrane damage are seen in COL2A1 mutation cases²⁾.
• Perivascular retinal degeneration: Retinal degeneration along blood vessels may be observed, which is one of the characteristic retinal findings of Stickler syndrome.
• Lattice degeneration and retinal tears: Multiple lattice degenerations in the peripheral retina increase the risk of progression to retinal tears and detachment. The average age of onset of retinal detachment is early teens, but the age range is wide, requiring long-term follow-up.
• Systemic findings: Pierre Robin sequence (micrognathia, cleft palate, glossoptosis) may be associated³⁾.

Q Why is retinal detachment common in Stickler syndrome?

A

Vitreous structural abnormalities (absence of PPVP, membranous degeneration) and multiple lattice degenerations significantly increase the risk of retinal tear formation and tractional retinal detachment¹⁾. For detailed mechanisms, see the “Pathophysiology” section.

3. Causes and Risk Factors

Stickler syndrome is caused by mutations in genes encoding type II and type XI collagen.

An overview of each gene and inheritance pattern is shown below.

Gene	Collagen Type	Inheritance Pattern
COL2A1	Type II	Autosomal dominant
COL11A1	Type XI α1 chain	Autosomal dominant
COL11A2	Type XI α2 chain	Autosomal dominant
COL9A1-3	Type IX	Autosomal recessive3)

• COL2A1 mutation: Affects type V collagen components of Bruch’s membrane, causing macular chorioretinal atrophy²⁾.
• De novo mutation: Sporadic cases without family history also exist, and diagnosis tends to be delayed.
• Systemic risk: May be diagnosed following Pierre Robin sequence in the neonatal period.

When to See an Eye Doctor

• If you are diagnosed with Stickler syndrome, you need regular eye exams even if you have no symptoms.
• If you experience a sudden increase in floaters, flashes of light, or a partial loss of vision, see an eye doctor immediately.
• If you have family members with retinal detachment or high myopia, consult your doctor about genetic testing.

4. Diagnosis and Testing Methods

Clinical Diagnostic Criteria

The Rose scoring system is used for diagnosis ¹⁾. Scores are assigned to each domain: eye, orofacial, hearing, joint, and skeletal, and the total score determines the diagnosis. Classification of the vitreous phenotype (membranous, fibrous, or normal) can help estimate the mutated gene.

Main Eye Examinations

• Slit-lamp microscopy and indirect ophthalmoscopy: Evaluation of vitreous membranous structures, lattice degeneration, and retinal tears.
• SS-OCT (swept-source OCT): Useful for detailed evaluation of Bruch’s membrane and macular chorioretinal atrophy ^{1, 3)}. Also used to confirm the extent of retinal detachment.
• Axial length measurement: Quantitative assessment of high myopia (axial elongation).
• Intraocular pressure measurement and visual field testing: Essential for early detection of glaucoma.

Genetic Testing

Mutation analysis of COL2A1, COL11A1, COL11A2, and COL9A1-3. Used for definitive diagnosis and genetic counseling. If the vitreous phenotype is membranous, suspect a COL2A1 or COL11A1 mutation.

Differential Diagnosis

• Wagner syndrome: Vitreous degeneration not due to COL2A1 mutation. No systemic symptoms.
• Knobloch syndrome: COL18A1 mutation. Associated with occipital encephalocele.
• Marfan syndrome: FBN1 mutation. Characterized by lens dislocation.

5. Standard Treatment

Prophylactic Retinal Laser Photocoagulation

This is the most important preventive intervention in Stickler syndrome. In untreated cases, the lifetime incidence of retinal detachment is 53.6%, whereas with prophylactic 360-degree barrier laser, it significantly decreases to 8.3%⁵⁾.

Treatment	Retinal Detachment Incidence
Untreated	53.6%5)
Prophylactic 360-degree laser	8.3%5)

The AAO (American Academy of Ophthalmology) Posterior Vitreous Detachment Preferred Practice Pattern (2024) recommends prophylactic 360-degree laser photocoagulation for patients with Stickler syndrome⁵⁾.

Prophylactic Treatment

360-degree barrier laser: Circumferential photocoagulation surrounding lattice degeneration and tears.

Target: All patients diagnosed with Stickler syndrome (regardless of symptoms).

Effect: Reduces the incidence of retinal detachment to about one-sixth⁵⁾.

Retinal Detachment Surgery

PPV (Pars Plana Vitrectomy): Anatomical reattachment rate 84.2%.

SB (Scleral Buckling): Anatomical reattachment rate 66.7%¹⁾.

In cases without PPVP, vitrectomy is considered advantageous¹⁾.

Glaucoma Management

Frequency: Complicated in 10.2%³⁾.

Treatment: Intraocular pressure control with eye drops.

Surgery: Angle surgery (e.g., trabeculotomy) is selected³⁾.

Cataract Surgery

Cataracts may be associated³⁾. In Marshall-Stickler syndrome due to COL11A1 mutation, surgical planning should consider abnormalities of the lens and vitreous structure.

Treatment Considerations

• Regular follow-up is necessary even after retinal detachment surgery. The risk of re-detachment is higher than in the general population.
• Glaucoma may progress without symptoms. Regular intraocular pressure and visual field testing should not be neglected.
• In surgeries requiring general anesthesia, attention should be paid to airway management in cases complicated by Pierre Robin sequence.

Q At what age should preventive surgery for retinal detachment be performed?

A

There is no clear consensus on a recommended age, but prophylactic laser treatment should be considered once the diagnosis is confirmed. It can be performed even in children, and early intervention is considered in cases with high risk of onset (such as COL2A1 mutations) ⁵⁾.

6. Pathophysiology and Detailed Mechanisms

Ocular symptoms in Stickler syndrome arise from multiple mechanisms due to structural abnormalities of collagen.

Vitreous Structural Abnormalities and Absence of PPVP

In normal eyes, a liquefied cavity called the posterior precortical vitreous pocket (PPVP) forms within the anterior vitreous cortex. In Stickler syndrome, abnormalities in type II and type XI collagen lead to the absence of this structure, and the vitreous appears uniformly membranous or fibrous ¹⁾. The absence of PPVP abnormally alters vitreoretinal adhesion, promoting lattice degeneration and tear formation.

Nagashima (2024) analyzed intraoperative vitreous findings in Stickler syndrome and reported that in cases with absent PPVP, the anatomical reattachment rate of vitrectomy (PPV) (84.2%) was superior to that of scleral buckling (66.7%) ¹⁾. This difference indicates that vitreous structural variations due to PPVP absence directly influence surgical technique selection.

Bruch’s Membrane Damage and Macular Atrophy

COL2A1 mutations affect type V collagen present in Bruch’s membrane ²⁾. Structural weakening of Bruch’s membrane leads to adhesion failure with the retinal pigment epithelium (RPE), causing macular chorioretinal atrophy. OCTA studies have confirmed the disappearance of the choriocapillaris layer in atrophic lesions ²⁾.

Fibril Diameter Regulation by Type XI Collagen

Type XI collagen (product of COL11A1) regulates the diameter of type II collagen fibrils ³⁾. COL11A1 mutations lead to abnormal collagen fibril diameter, contributing to structural abnormalities of the lens and vitreous.

7. Latest Research and Future Perspectives (Investigational Reports)

For Patients: Please Read Carefully

The following content is currently under investigation or in clinical trials and is not standard treatment available at general hospitals. It is reference information for professionals regarding future medical developments.

Macular and Choroidal Evaluation Using OCT/OCTA

Shah (2025) performed macular evaluation using OCT/OCTA in a case of COL2A1 mutation Stickler syndrome and described macular chorioretinal atrophy with loss of the choriocapillaris layer ²⁾. Bruch’s membrane type V collagen dysfunction is suggested as the mechanism of atrophy, which may become a future therapeutic target.

Relationship Between PPVP and Vitrectomy Outcomes

Nagashima (2024) reported that the presence or absence of PPVP is an important indicator for selecting the surgical approach for retinal detachment in Stickler syndrome ¹⁾. Establishing a protocol for preoperative PPVP assessment using SS-OCT is a future challenge ¹⁾.

Understanding the Actual Status of Pediatric Glaucoma

Gocuk (2026) reported that the glaucoma complication rate reaches 10.2% in a pediatric cohort with Stickler syndrome, emphasizing the importance of early screening ³⁾. Further long-term studies are needed on the type, progression rate, and optimal timing of treatment intervention for glaucoma.

Q Is there a possibility of gene therapy being a treatment option in the future?

A

Since it is a monogenic disease with identified causative genes such as COL2A1, it could theoretically be a candidate for gene therapy. However, at present, gene therapy is not a standard treatment and remains at the research stage. Currently, managing ocular complications with prophylactic laser is the most effective strategy ⁵⁾.

Q Do patients with Stickler syndrome need collaboration with other medical departments?

A

Yes. Collaboration with oral surgery/plastic surgery for cleft palate, otolaryngology for hearing loss, orthopedics for joint/skeletal deformities, and pediatrics/internal medicine for systemic management is required. Multidisciplinary team management is the standard approach.

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8. References

1. Nagashima T, et al. Posterior precortical vitreous pocket and surgical outcomes in Stickler syndrome retinal detachment. Retina. 2024.
2. Shah S, Smith SV, Schrantz JS, Bhende M. COL2A1 mutation causing pediatric macular chorioretinal atrophy associated with Stickler syndrome. J Vitreoretin Dis. 2025;9(3):362-366. PMCID: PMC11686495. doi:10.1177/24741264241309682.
3. Snead MP, McNinch AM, Poulson AV, et al. Stickler syndrome, ocular-only variants and a key diagnostic role for the ophthalmologist. Eye (Lond). 2011;25(11):1389-1400. PMID: 21921955. PMCID: PMC3292419. doi:10.1038/eye.2011.201.
4. Gocuk SA, et al. Paediatric glaucoma in Stickler syndromes: a systematic review and cross-sectional survey from the United Kingdom. BMJ Open Ophthalmol. 2025;10:e002138. doi:10.1136/bmjophth-2025-002138.
5. American Academy of Ophthalmology. Posterior Vitreous Detachment, Retinal Breaks, and Lattice Degeneration Preferred Practice Pattern. AAO; 2024.