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Any autosomal recessive Stickler syndrome in which the cause of the disease is a mutation in the COL9A2 gene.
Features include always present findings: Retinal detachment, Short stature, Short chin, and Inner ear hearing loss (sensorineural hearing impairment) and others. 9 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Eyes | 2 | Retinal detachment, Cataract |
COL9A2 encodes collagen type IX alpha 2 chain (689 aa). Structural component of hyaline cartilage and vitreous of the eye Highest expression in Pituitary (193.7 TPM) and Brain Spinal cord cervical c-1 (136.8 TPM).
Stickler syndrome, type 5 is associated with mutations in the COL9A2 gene on chromosome 1.
COL9A2 is classified as a druggable target (Druggable Genome category) with score 2.6.
No consensus clinical diagnostic criteria for Stickler syndrome have been published.
Stickler syndrome should be suspected in individuals with a combination of the following clinical and radiographic findings.
Clinical findings
Cleft palate (open cleft, submucous cleft, or bifid uvula)
No approved treatments are currently available for Stickler syndrome, type 5. The disease remains an area of unmet medical need.
No clinical practice guidelines for Stickler syndrome have been published. Evaluations Following Initial Diagnosis To establish the extent of disease and needs in an individual diagnosed with Stickler syndrome, the evaluations summarized (if not performed as part of the evaluation that led to the diagnosis) are recommended. Table 5. Stickler Syndrome: Recommended Evaluations Following Initial Diagnosis
To monitor existing manifestations, the individual's response to supportive care, and the emergence of new manifestations, the evaluations summarized in are recommended.
Table 7.
Stickler Syndrome: Recommended Surveillance
System/Concern | Evaluation | Frequency
Eyes | Exam by vitreoretinal specialist | Annually
No clinical trials have been registered for Stickler syndrome, type 5.
21 publications have been identified in PubMed for Stickler syndrome, type 5. Research spans Case Report / Case Series (38%), Diagnostic / Biomarker (14%), and Review / Meta-Analysis (14%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 8 | 38% |
Data assembled from 6 of 12 sources · Last updated Sep 18, 2026, 11:35 PM UTC
Online Mendelian Inheritance in Man
Genetic and Rare Diseases Info Center
Common questions about Stickler syndrome, type 5
1 |
Short stature |
Ears | 1 | Inner ear hearing loss (sensorineural hearing impairment) |
Stickler syndrome is characterized by typical craniofacial features, ocular manifestations, hearing impairment, and osteoarticular problems. To date, more than 1,000 individuals have been identified with Stickler syndrome due to a pathogenic variant(s) in one of the genes listed in . The following description of the phenotypic features associated with this condition is based on these reports. Table 2. Stickler Syndrome: Frequency of Select Features by Related Gene Feature | % of Persons w/Feature1
COL2A1-SS | COL11A1-SS | COL11A2-SS | COL9A1-, COL9A2-, COL9A3-SS |
|---|---|---|---|
Cleft palate | 30%-60% | 60% | 35% |
Myopia | 80%-90% | 80%-85% | -- |
Retinal detachment | 40%-70% | 40% | -- |
Hearing impairment | 20%-50%(SNHL ±conductive HL) | 75%-80% | 60% |
Skeletal manifestations2 | 35%-40% | 25% | 50% |
Source: GeneReviews — "Stickler Syndrome"
Although inter- and intrafamilial variation is common, some generalities can be made regarding genotype-phenotype correlations. COL2A1-related Stickler syndrome. Pathogenic variants in COL2A1 that cause Stickler syndrome are typically loss-of-functions variants associated with haploinsufficiency of type II collagen (e.g., nonsense variants, small deletions/duplications, splicing variants that cause a frameshift). COL2A1 pathogenic variants that do not result in a premature stop codon and/or nonsense-mediated RNA decay but have a dominant-negative effect are causative for the more severe type II collagenopathies such as spondyloepiphyseal dysplasia congenita . These are usually missense variants causing a glycine substitution in the triple helical domain.
Source: GeneReviews — "Stickler Syndrome"
Ocular manifestations including high myopia, vitreous abnormalities, cataracts, and/or retinal abnormalities
Sensorineural hearing loss with or without conductive hearing loss
Osteoarticular manifestations with joint pain in childhood and early-onset degenerative joint disease in adulthood
Imaging findings
Source: GeneReviews — "Stickler Syndrome"
A number of disorders have features that overlap with those of Stickler syndrome. Pierre Robin sequence. Approximately one third of individuals with Pierre Robin sequence have an underlying syndrome, of which Stickler syndrome is the most common . Binder syndrome (maxillonasal dysplasia) (OMIM 155050). Affected individuals typically have an unusually flat, underdeveloped midface (midfacial hypoplasia), with an abnormally short nose and flat nasal bridge and underdeveloped upper jaw. Binder syndrome may not represent a distinct disease entity or syndrome but rather a developmental anomaly that can be seen in several syndromes such as Stickler syndrome, campomelic dysplasia, and chondrodysplasia punctata. Table 4. Genes of Interest in the Differential Diagnosis of Stickler Syndrome
Gene(s) | Disorder | MOI | Clinical Features of Differential Diagnosis Disorder |
|---|---|---|---|
ZNF644 | High-grade myopia (OMIM PS160700) | ADARXL1 | Refractive error ≥ 6 diopters |
ATOH7 | Nonsyndromic congenital retinal nonattachment (NCRNA) (OMIM 221900) | AR | Congenital insensitivity to light, massive retrolental mass, shallow anterior chamber, microphthalmia, nystagmus in otherwise normal individuals |
BMP4 | BMP4-related disorder2 | AD | High myopia, congenital hypoplasia of the vitreous, retinal detachment, high-arched palate, retrognathia, sensorineural hearing loss |
GZF1 | GZF1-related disorder2 | AR | High myopia, retinal detachment, chorioretinal coloboma, hearing loss, joint laxity dislocations, kyphoscoliosis, talipes |
KCNJ13 | Snowflake vitreoretinal degeneration (OMIM 193230) | AD | Cataract, fibrillar degeneration of the vitreous, peripheral retinal abnormalities incl minute, shiny, crystalline-like deposits resembling snowflakes. Individuals show a low rate of retinal detachment. |
LOXL3 | LOXL3-related disorder2 | AR | Myopia, vitreous detachment, flat midface, cleft palate, micrognathia, mild conductive hearing loss, joint laxity |
LRP2 | LRP2-related disorder2 (See also Donnai-Barrow Syndrome.) | AR | Myopia, retinal detachment, abnormal vitreous, flat midface, retrognathia, joint pain |
VCAN | VCAN-related vitreoretinopathy (incl Wagner syndrome erosive vitreoretinopathy)(OMIM 143200) | AD | "Optically empty vitreous" on slit lamp exam avascular vitreous strands veils, myopia, presenile cataract, night blindness of variable degree assoc w/progressive chorioretinal atrophy, retinal traction retinal detachment at advanced stages of the disease visual acuity. |
Source: GeneReviews — "Stickler Syndrome"
Genetic testing for COL9A2 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for Stickler syndrome, type 5 has been reported in the published literature.
System/Concern | Evaluation | Comment |
|---|---|---|
Eyes | Ophthalmologic exam | Preferably by expert ophthalmologist familiar w/the ophthalmic complications (e.g., high myopia, vitreous changes, retinal detachment) |
Genetic counseling | By genetics professionals1 | To obtain a pedigree inform affected persons their families re nature, MOI, implications of Stickler syndrome to facilitate medical personal decision making Family support resources |
Stickler Syndrome: Treatment of Manifestations Manifestation/Concern | Treatment | Considerations/Other |
Respiratory | Infants w/PRS may require tracheostomy to ensure a competent airway. | In most persons, micrognathia tends to become less prominent over time, allowing for removal of tracheostomy. |
Micrognathia | Mandibular advancement procedure may be needed for persistent micrognathia to correct malocclusion. | — |
Cleft palate | Mgmt per craniofacial specialists incl feeding/nutrition mgmt | Ocular manifestations |
Early-onset arthropathy | Symptomatic treatment incl over-the-counter anti-inflammatory medications before after physical activity | At present, no prophylactic therapies to minimize joint damage in affected persons exist. |
Spinal other osteoarticular abnormalities | Treatment per orthopedist | PRS = Pierre Robin sequence 1. To monitor existing manifestations, the individual's response to supportive care, and the emergence of new manifestations, the evaluations summarized in are recommended. Table 7. |
Stickler Syndrome: Recommended Surveillance System/Concern | Evaluation | Frequency |
Eyes | Exam by vitreoretinal specialist | Annually Hearing |
Orthopedic | Clinical radiographic assessment for joint spine manifestations | As needed Affected individuals should be advised to avoid activities that may lead to traumatic retinal detachment (e.g., contact sports). Some physicians recommend avoiding physical activities that involve high impact to the joints to delay the onset of the arthropathy. |
Source: GeneReviews — "Stickler Syndrome"
Affected individuals should be advised to avoid activities that may lead to traumatic retinal detachment (e.g., contact sports). Some physicians recommend avoiding physical activities that involve high impact to the joints to delay the onset of the arthropathy. While this recommendation seems logical, there are no data to support it.
Source: GeneReviews — "Stickler Syndrome"
Search ClinicalTrials.gov in the US and EU Clinical Trials Register in Europe for access to information on clinical studies for a wide range of diseases and conditions. Note: There may not be clinical trials for this disorder.
Source: GeneReviews — "Stickler Syndrome"
View trials for Stickler syndrome, type 5
| Audiologic eval
| Clinical radiographic assessment for joint spine manifestations | As needed
Source: GeneReviews — "Stickler Syndrome"
Phenotype severity distribution: 7 always present features.
3 |
14% |
Research summaries | 3 | 14% |
Clinical study results | 3 | 14% |
Disease patterns and progression | 3 | 14% |
Laboratory research | 1 | 5% |
Britten-Jones AC (2026). [PMID: 41856555](https://pubmed.ncbi.nlm.nih.gov/41856555/). *Journal of medical genetics*. [Diagnostic / Biomarker]
Gyokova E (2026). [PMID: 41828453](https://pubmed.ncbi.nlm.nih.gov/41828453/). *International journal of molecular sciences*. [Diagnostic / Biomarker]
Sánchez CMD (2026). [PMID: 41052910](https://pubmed.ncbi.nlm.nih.gov/41052910/). *Clinical genetics*. [Case Report / Case Series]
Constant A (2026). [PMID: 40930209](https://pubmed.ncbi.nlm.nih.gov/40930209/). *American journal of ophthalmology*. [Case Report / Case Series]
He W (2025). [PMID: 40763965](https://pubmed.ncbi.nlm.nih.gov/40763965/). *Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics*. [Case Report / Case Series]
Yuan MZ (2025). [PMID: 40605304](https://pubmed.ncbi.nlm.nih.gov/40605304/). *[Zhonghua yan ke za zhi] Chinese journal of ophthalmology*. [Case Report / Case Series]
Meurice T (2025). [PMID: 39870193](https://pubmed.ncbi.nlm.nih.gov/39870193/). *Journal of stomatology, oral and maxillofacial surgery*. [Review / Meta-Analysis]
Patel RK (2025). [PMID: 40600801](https://pubmed.ncbi.nlm.nih.gov/40600801/). *Annals of plastic surgery*. [Clinical Trial Publication]
Jacobson A (2025). [PMID: 41461222](https://pubmed.ncbi.nlm.nih.gov/41461222/). *Ophthalmology. Glaucoma*. [Clinical Trial Publication]
Maghsoudi D (2025). [PMID: 39406934](https://pubmed.ncbi.nlm.nih.gov/39406934/). *Eye (London, England)*. [Case Report / Case Series]