How is Huntington disease-like syndrome diagnosed?

Information about how Huntington disease-like syndrome is diagnosed is currently limited for this condition.

Are there treatments for Huntington disease-like syndrome?

Information about treatment options and management approaches is currently limited for this condition.

What complications can arise from Huntington disease-like syndrome?

Information about complications from Huntington disease-like syndrome is currently limited. However, since this condition shares some features with Huntington's disease, it may lead to challenges in movement, behavior, and cognitive function. It's important to monitor these aspects closely and work with healthcare providers to manage any arising issues.

How does Huntington disease-like syndrome affect daily life?

Daily life for someone with Huntington disease-like syndrome can be impacted, but specific details are currently limited. Patients may experience difficulties with movement and thinking, which can affect their ability to perform everyday tasks. Support from family and healthcare professionals can help manage these challenges.

What is the prognosis for someone with Huntington disease-like syndrome?

Information about the prognosis for Huntington disease-like syndrome is currently limited. Since this condition is not fully understood, it's hard to predict how it will progress or affect life expectancy. Regular check-ups with healthcare providers can help monitor the condition and provide support.

Are there specific specialists I should see for Huntington disease-like syndrome?

Currently, there is limited information on which specialists are best for Huntington disease-like syndrome. However, it may be helpful to consult neurologists who specialize in movement disorders. They can provide guidance and support tailored to the unique challenges of this condition.

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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

Huntington disease-like syndrome - Clinical Profile, Genes & Research | Kisho | Kisho

Rare Disease

Huntington disease-like syndrome

MONDO:0015548

Also known as:Huntington disease phenocopy syndrome

Overview

ResearchLimited published research (4 articles)

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.

No HPO annotations are available for this condition.

GeneReviews

Clinical Guidance

ATN1-related neurodevelopmental disorder (ATN1-NDD) is characterized by developmental delay/ intellectual disability. Other neurologic findings can include brain malformations, epilepsy, cortical visual impairment, infantile hypotonia, and hearing loss. Feeding difficulties, present in some individuals, may require gastrostomy support when severe; similarly, respiratory issues, present in some, may require respiratory support after the neonatal period. Distinctive facial and limb features are commonly reported. Other variable findings can include cardiac malformations and congenital anomalies of the kidney and urinary tract (CAKUT). To date, 18 individuals have been identified with ATN1-NDD . The following description of the phenotypic features associated with this condition is based on these reports. Table 2. Select Features of ATN1-Related Neurodevelopmental Disorder

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 ATN1-related neurodevelopmental disorder (ATN1-NDD) have been published.

Suggestive Findings

ATN1-related neurodevelopmental disorder (ATN1-NDD) should be considered in individuals with the following clinical and brain MRI findings.

Clinical Findings

Common

Developmental delay (DD) or intellectual disability (ID) that is typically profound and rarely mild

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 Huntington disease-like syndrome. The disease remains an area of unmet medical need.

GeneReviews

Management Guidelines

Although no clinical practice guidelines for ATN1-related neurodevelopmental disorder (ATN1-NDD) have been published, have proposed management recommendations. Evaluations Following Initial Diagnosis To establish the extent of disease and needs in an individual diagnosed with ATN1-NDD, the evaluations summarized (if not performed as part of the evaluation that led to diagnosis) are recommended. Table 4. Recommended Evaluations Following Initial Diagnosis in Individuals with ATN1-Related Neurodevelopmental Disorder

Prognosis

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

GeneReviews

Surveillance Guidelines

Regular clinic visits are recommended because of the complexity of the medical and developmental issues associated with ATN1-NDD. The frequency of visits should be decided on a person-by-person basis, but may need to be greater (e.g., every 3-6 months) in the first two years of life, then stretching to visits every six months to one year when the child is stable. Table 6. Recommended Surveillance for Individuals with ATN1-Related Neurodevelopmental Disorder

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 Huntington disease-like syndrome.

4 publications have been identified in PubMed for Huntington disease-like syndrome. Research spans Case Report / Case Series (50%), Diagnostic / Biomarker (25%), and Basic Science / Preclinical (25%).

Recent Publications

Berns M (2026). [PMID: 41843312](https://pubmed.ncbi.nlm.nih.gov/41843312/). *Cerebellum (London, England)*. [Case Report / Case Series]
Namuli KL (2026). [PMID: 41254939](https://pubmed.ncbi.nlm.nih.gov/41254939/). *HGG advances*. [Basic Science / Preclinical]
Koriath CAM (2025). [PMID: 39443079](https://pubmed.ncbi.nlm.nih.gov/39443079/). *Journal of neurology, neurosurgery, and psychiatry*. [Diagnostic / Biomarker]
Baille G (2024). [PMID: 39289638](https://pubmed.ncbi.nlm.nih.gov/39289638/). *BMC neurology*. [Case Report / Case Series]

Data assembled from 4 of 12 sources · Last updated Sep 20, 2026, 5:31 PM UTC

MONDOHPOClinicalTrials.govFDAPubMedHGNCClinVarClinGenGeneReviewsOrphanetOMIMRUSP

Medical References

External Resources

Orphanet

European rare disease database

Orphanet:158266

GARD

Genetic and Rare Diseases Info Center

GARD:20029

Questions for Your Care Team

→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 Huntington disease-like syndrome

Information about the overall nature of Huntington disease-like syndrome is currently limited for this condition. This condition is also known as Huntington disease phenocopy syndrome and is listed in Orphanet (Orphanet:158266) and in the Genetic and Rare Diseases Information Center (GARD:20029).

Information about symptoms is currently limited for this condition.

Information about the causes, genetics, and risk factors is currently limited for this condition. Associated genes include ATXN1, ATXN3, TBP, FTL, ATXN2.

← Back to All Diseases

Feature	# of Persons w/Feature	Comment
Mild	1/18	—
Moderate	0/18	—
Profound	17/18	—
Hypotonia	17/18	—
Respiratory difficulties	13/18	9/18: Obstructive sleep apnea3/18: Central sleep apnea
Feeding difficulties	12/18	9/18: Gastrostomy feeding8/18: Dysphagia9/18: GERD
Epilepsy	9/18	—
Cortical visual impairment	9/18	—
Hearing loss	9/18	—
Ophthalmologic involvement	7/18	Strabismus, hypermetropia, microphthalmia
Cardiac malformation	8/18	—
Genital anomalies	4/18	Cryptorchidism
CAKUT	2/18	Renal hypoplasia or agenesis CAKUT= congenital anomalies of the kidney and urinary tract; DD/ID = developmental delay/ intellectual disability; GERD = gastroesophageal reflux disease Developmental delay (DD) and intellectual disability (ID).

System/Concern	Evaluation	Comment
Constitutional	Assess length, weight, head circumference.	—
Development	Developmental assessment	To incl motor, adaptive, cognitive, speech/language eval; Eval for early intervention program/ IEP
Neurologic	Neurologic eval	To incl brain MRI if not performed at time of diagnosis; Consider EEG if seizures are a concern.; Assess for cortical visual impairment.
Speech/Language	By speech-language pathologist	To assess need for speech therapy /or alternative means of communication
Respiratory	Pediatric assessment	Screening for central obstructive apnea in neonatal period; Consider referral to sleep specialist /or respiratory physician if respiratory /or sleep symptoms occur.
Feeding	Gastroenterology/ nutrition/ feeding team eval	To incl eval of aspiration risk nutritional status; Consider eval for gastric tube placement in persons w/dysphagia /or aspiration risk.
Cardiovascular	Pediatric assessment	To incl EKG echocardiogram; Refer to cardiologist if concerns are identified.
Orthopedics	Eval by orthopedist	To incl assessment for:; Craniocervical junction stenosis, preferably by spine MRI; Scoliosis, hip dislocation Activities of
daily living	Physical medicine rehab/ PT OT eval	To incl assessment of:; Gross motor fine motor skills; Mobility, activities of daily living, need for adaptive devices; Need for PT (to improve gross motor skills) /or OT (to improve fine motor skills)
Craniofacial	Pediatric assessment	To screen for orofacial clefting/ micrognathia in neonatal period refer to maxillofacial specialist if there are concerns
Genitourinary	Pediatric assessment	To incl renal/abdominal ultrasound to assess for renal agenesis or hypoplasia; Assess for cryptorchidism.
Vision	Ophthalmologic eval	To assess for vision, abnormal ocular movement, best corrected visual acuity, refractive errors, strabismus
Hearing	Audiologic eval	Assess for hearing loss. Genetic
counseling	By genetics professionals1	To inform affected persons their families re nature, MOI, implications of ATN1-NDD to facilitate medical personal decision making Family support resources
Treatment of Manifestations in Individuals with ATN1-Related Neurodevelopmental Disorder Manifestation/Concern	Treatment	Considerations/Other DD/ID

Kisho

Huntington disease-like syndrome

Overview

Clinical Presentation

Clinical Guidance

Diagnosis

Diagnostic Criteria

Suggestive Findings

Treatment

Management Guidelines

Prognosis

Surveillance Guidelines

Research Landscape

Recent Publications

Medical References

External Resources

Orphanet

GARD

Questions for Your Care Team

Questions for Your Care Team

FAQ

Frequently Asked Questions

Differential Diagnosis

Clinical Guidance

Therapies Under Investigation

Clinical Trials

Huntington disease-like syndrome

Overview

Clinical Presentation

Clinical Guidance

Diagnosis

Diagnostic Criteria

Suggestive Findings

Treatment

Management Guidelines

Prognosis

Surveillance Guidelines

Research Landscape

Recent Publications

Medical References

External Resources

Orphanet

GARD

Subtypes

Related Diseases

Questions for Your Care Team

Questions for Your Care Team

FAQ

Frequently Asked Questions

What is Huntington disease-like syndrome?

What are the symptoms of Huntington disease-like syndrome?

What causes Huntington disease-like syndrome?

How is Huntington disease-like syndrome diagnosed?

Are there treatments for Huntington disease-like syndrome?

What complications can arise from Huntington disease-like syndrome?

How does Huntington disease-like syndrome affect daily life?

What is the prognosis for someone with Huntington disease-like syndrome?

Are there specific specialists I should see for Huntington disease-like syndrome?

Differential Diagnosis

Clinical Guidance

Therapies Under Investigation

Clinical Trials