How is Treacher Collins syndrome 4 inherited?

Treacher Collins syndrome 4 follows an autosomal dominant inheritance pattern. This means inheriting just one copy of the altered gene from either parent can cause the condition.

How is Treacher Collins syndrome 4 diagnosed?

Information about diagnosis is currently limited for this condition.

Are there treatments for Treacher Collins syndrome 4?

Information about treatment is currently limited for this condition.

What are the potential complications of Treacher Collins syndrome 4?

Information about specific complications of Treacher Collins syndrome 4 is limited. However, since this syndrome affects facial development, individuals may face challenges related to breathing, hearing, and eating. It's important for families to work closely with healthcare providers to monitor and manage any complications that may arise.

How might Treacher Collins syndrome 4 affect daily life?

Daily life for someone with Treacher Collins syndrome 4 may include unique challenges due to facial differences. These challenges can impact social interactions and self-esteem. Support from family, friends, and professionals can help individuals navigate these daily experiences and promote a positive quality of life.

What is the prognosis for someone with Treacher Collins syndrome 4?

Currently, there is limited information about the prognosis for individuals with Treacher Collins syndrome 4. Since it is a genetic condition, the long-term outlook may vary based on the severity of symptoms and any complications that arise. Regular check-ups with healthcare providers can help monitor health and development over time.

Are there any specialists recommended for managing Treacher Collins syndrome 4?

While specific specialist recommendations for Treacher Collins syndrome 4 are not detailed, individuals may benefit from seeing a team of healthcare providers. This could include geneticists, otolaryngologists (ear, nose, and throat doctors), and speech therapists. These specialists can help address the various aspects of the condition and support the individual's needs.

Kisho

Kisho is an information platform, not a medical provider. Nothing on this site constitutes medical advice, diagnosis, or treatment recommendations. All content is aggregated from publicly available sources (including ClinicalTrials.gov, PubMed, FDA.gov, and Orphanet) and is provided for informational purposes only. Clinical trial eligibility, treatment decisions, and any health-related actions should always be discussed with a qualified healthcare professional. Kisho does not endorse any specific therapy, organization, or clinical trial. Terms of use · Privacy policy

Treacher Collins syndrome 4 (TCS4) - Clinical Profile, Genes & Research | Kisho | Kisho

Rare Disease

Treacher Collins syndrome 4

MONDO:0030067

Also known as:TCS4

Overview

GeneticsAutosomal dominant · POLR1B (chr 2)

OnsetNEONATAL

Clinical Presentation

Built from Human Phenotype Ontology (HPO) phenotype annotations and GeneReviews clinical descriptions. Features represent findings documented across known cases — not an exhaustive list of possible symptoms.

Features include always present findings: Downslanted palpebral fissures and Malar flattening; and very common findings: Feeding difficulties in infancy, Conductive hearing impairment, and Micrognathia. 13 total HPO annotations.

Organ System	Phenotype Count	Example Features
Head and neck	3	Cleft palate, Microcephaly, Facial asymmetry

Genetic Landscape

Assembled from HGNC gene records, ClinGen gene-disease validity evidence, and ClinVar pathogenic variant data. Validity classifications reflect the strength of published evidence linking each gene to this disease.

POLR1B function has not been fully characterized.

Treacher Collins syndrome 4 has been associated with mutations in the POLR1B gene on chromosome 2.

GeneReviews

Clinical Guidance

TCOF1

Diagnosis

Drawn from GeneReviews diagnostic guidelines, newborn screening panel status (RUSP), and ClinGen gene-disease validity classifications. Reflects current clinical evidence and consensus where available.

GeneReviews

Diagnostic Criteria

No consensus clinical diagnostic criteria for Treacher Collins syndrome (TCS) have been published.

Suggestive Findings

TCS should be suspected in probands with the following craniofacial features, conductive hearing loss, and radiographic features.

Craniofacial features

Source: GeneReviews — "Treacher Collins Syndrome"

Treatment

Compiled from FDA-approved drug records, orphan drug designations, and FDA Adverse Event Reporting System (FAERS) safety data. GeneReviews management guidance is included where available.

No approved treatments are currently available for Treacher Collins syndrome 4. The disease remains an area of unmet medical need.

GeneReviews

Management Guidelines

No clinical practice guidelines for Treacher Collins syndrome (TCS) have been published. In the absence of published guidelines, the following recommendations are based on the authors' personal experience managing individuals with this disorder. Evaluations Following Initial Diagnosis To establish the extent of disease and needs in an individual diagnosed with TCS, the evaluations summarized (if not performed as part of the evaluation that led to the diagnosis) are recommended. Table 4. Treacher Collins Syndrome: Recommended Evaluations Following Initial Diagnosis

Prognosis

Based on GeneReviews surveillance recommendations, HPO phenotype frequency and severity annotations, and published prevalence estimates from Orphanet and OMIM.

GeneReviews

Surveillance Guidelines

To monitor existing manifestations, the individual's response to supportive care, and the emergence of new manifestations, the evaluations summarized in are recommended. Table 5. Recommended Surveillance for Individuals with Treacher Collins Syndrome

Research Landscape

Sourced from ClinicalTrials.gov and PubMed. Publication types are classified using NLM-curated article metadata; research type breakdowns reflect the nature of published work for this disease.

No clinical trials have been registered for Treacher Collins syndrome 4.

66 publications have been identified in PubMed for Treacher Collins syndrome 4. Research spans Basic Science / Preclinical (41%), Epidemiology / Natural History (21%), and Review / Meta-Analysis (12%).

Research Type	Count	% of Total
Laboratory research	27	41%

Data assembled from 7 of 12 sources · Last updated Sep 21, 2026, 12:56 PM UTC

MONDOHPOClinicalTrials.govFDAPubMedHGNCClinVarClinGenGeneReviewsOrphanetOMIMRUSP

Medical References

External Resources

OMIM

Online Mendelian Inheritance in Man

OMIM:618939

GARD

Genetic and Rare Diseases Info Center

GARD:16396

Questions for Your Care Team

→Should I pursue genetic testing for POLR1B, and what would the results mean for my family?
→Are there specialists or centers of excellence for this condition in my area?
→Is there a patient registry I should consider joining?

FAQ

Frequently Asked Questions

Common questions about Treacher Collins syndrome 4

Treacher Collins syndrome 4 is a rare genetic condition that is part of a group of disorders affecting facial development. While detailed descriptions are not available from the provided sources, it is recognized as one of the types of Treacher Collins syndrome. Information about the overall definition and specific manifestations of this condition is limited. People with this syndrome may experience facial differences related to its developmental nature, but further details are not provided in the current sources.

Information about symptoms is currently limited for this condition.

The condition is linked to genetic changes involving the POLR1B gene. This gene is associated with the development of the condition, as noted in the source information. Additional details about other causes or risk factors were not provided. Associated genes include POLR1B.

← Back to All Diseases

Differential Diagnosis

Table 3a. Genes of Interest in the Differential Diagnosis of Treacher Collins Syndrome

Gene	Disorder	MOI	Features of Disorder
DHODH	Postaxial acrofacial dysostosis, DHODH-related (Miller syndrome) (OMIM 263750)	AR	Mandibulofacial dysostosis; Eyelid coloboma; Micrognathia; Cleft lip/palate
PLCB4	Auriculocondylar syndrome (OMIM PS602483)	ADAR	Mandibulofacial hypoplasia; Malformed ears; Micrognathia
EDNRA	Mandibulofacial dysostosis w/alopecia, EDNRA-related (OMIM 616367)	AD	Mandibulofacial dysostosis; Malformed ears; Eyelid coloboma
EFTUD2	Mandibulofacial dysostosis w/microcephaly, EFTUD2-related (Guion-Almeida type)	AD	Mandibulofacial dysostosis; Microtia; Preauricular skin tags
Thumb abnormalities in ~33% FOXI31SF3B22	Hemifacial microsomia (Goldenhar syndrome, Oculo-auriculo-vertebral spectrum) (OMIM PS164210)	ADAR	Mandibulofacial dysostosis; Microtia; Preauricular skin tags; Cleft lip/palate
Vertebral anomalies, Klippel-Feil anomaly POLR1A3	Mandibulofacial dysostosis w/limb deficiencies, POLR1A-related (Cincinnati type) (OMIM 616462)	AD	Mandibulofacial dysostosis; Micrognathia; Eyelid coloboma; Cleft lip/palate; Microtia/anotia
TSR2	Diamond-Blackfan anemia w/mandibulofacial dysostosis	ADXL	Downslanted palpebral fissures; Micrognathia; Mandibulofacial dysostosis; Malformed ears
SF3B4	Acrofacial dysostosis, SF3B4-related (Nager syndrome) (OMIM 154400)	AD	Downslanted palpebral fissures; Micrognathia; Mandibulofacial dysostosis; Preaxial abnormalities (e.g.

Source: GeneReviews — "Treacher Collins Syndrome"

System/Concern	Evaluation	Comment
Eyes	Ophthalmologic eval w/attention to extraocular movement, corneal exposure, visual acuity	—
Hearing	Formal audiology eval (See Genetic Hearing Loss Overview.)	In those w/conductive hearing loss identified at age 6 mos: craniofacial CT scan (axial coronal slices) to assess anatomy of head neck, external auditory canal, middle ear, inner ear
Respiratory	Assess for choanal atresia/stenosis, micrognathia, glossoptosis predisposing to obstruction of oropharynx.	If obstructive sleep apnea is suspected, consider sleep study.
Feeding/Nutrition	Assess for cleft palate swallowing function.	—
Dental	Assess for dental anomalies.	When teeth have erupted
Cardiac	Cardiology eval w/echocardiogram	To assess for structural heart defects
Gastrointestinal	In those w/persistent feeding issues, consider assessment for pyloric stenosis, esophageal abnormalities, intestinal pseudo-obstruction.	—
Musculoskeletal	Clinical assessment for spine limb anomalies w/radiographs as needed	—
Renal	Renal ultrasound	To assess for structural renal defects
Genetic counseling	By genetics professionals1	To inform affected persons their families re nature, MOI, implications of TCS to facilitate medical personal decision making Family support
resources	By clinicians, wider care team, family support organizations	Assessment of family social structure to determine need for:; Community or such as Parent to Parent; Social work involvement for parental support; Home nursing referral MOI = mode of inheritance; TCS = Treacher Collins syndrome 1.

Kisho

Treacher Collins syndrome 4

Overview

Clinical Presentation

Genetic Landscape

Clinical Guidance

Diagnosis

Diagnostic Criteria

Suggestive Findings

Treatment

Management Guidelines

Prognosis

Surveillance Guidelines

Research Landscape

Medical References

External Resources

OMIM

GARD

Questions for Your Care Team

Questions for Your Care Team

FAQ

Frequently Asked Questions

Clinical Guidance

Explore clinical features

Penetrance

Differential Diagnosis

Therapies Under Investigation

Clinical Trials

Recent Publications

Treacher Collins syndrome 4

Overview

Clinical Presentation

Genetic Landscape

Clinical Guidance

Diagnosis

Diagnostic Criteria

Suggestive Findings

Treatment

Management Guidelines

Prognosis

Surveillance Guidelines

Research Landscape

Medical References

External Resources

OMIM

GARD

Related Diseases

Questions for Your Care Team

Questions for Your Care Team

FAQ

Frequently Asked Questions

What is Treacher Collins syndrome 4?

What are the symptoms of Treacher Collins syndrome 4?

What causes Treacher Collins syndrome 4?

How is Treacher Collins syndrome 4 inherited?

How is Treacher Collins syndrome 4 diagnosed?

Are there treatments for Treacher Collins syndrome 4?

What are the potential complications of Treacher Collins syndrome 4?

How might Treacher Collins syndrome 4 affect daily life?

What is the prognosis for someone with Treacher Collins syndrome 4?

Are there any specialists recommended for managing Treacher Collins syndrome 4?

Clinical Guidance

Explore clinical features

Penetrance

Differential Diagnosis

Therapies Under Investigation

Clinical Trials

Recent Publications