X Linked Intellectual Disability Cerebellar Hypoplasia Syndrome C1845366
An X-linked disorder causing underdevelopment of the cerebellum, leading to coordination problems and intellectual disability. Management includes physical therapy and developmental support.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Cerebellar hypoplasia
(neurologic)Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Ataxia
(neurologic)Nystagmus
(neurologic)Spasticity
(neurologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Cerebellar Rehabilitation Program
Specialized physical therapy targeting balance, coordination, and gait training specific to cerebellar hypoplasia. Includes vestibular rehabilitation and proprioceptive training components.
Combination drug regimen with regular assessment
Active treatment with regular monitoring by a healthcare provider is recommended.
Speech and Swallowing Therapy
Speech-language pathology intervention for dysarthria, dysphagia, and communication difficulties. Includes oral motor exercises, swallowing strategies, and augmentative communication if needed.
Additional treatment options
Neurological Symptom Management
Pharmacological treatment for associated symptoms such as tremors, hypotonia, or seizures. Medications chosen based on specific symptom profile and individual response trials.
medicationHydrotherapy
Aquatic-based therapy utilizing water resistance and buoyancy to improve motor function, balance, and strength in a low-impact environment. Particularly beneficial for gait training.
complementaryNeurodevelopmental Surveillance
Ongoing assessment of developmental milestones, motor function, and cognitive progress. Includes periodic neuroimaging to evaluate cerebellar development and rule out progressive changes.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is X Linked Intellectual Disability Cerebellar Hypoplasia Syndrome C1845366?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Moez SM, Al-Harthi HA, Khan ZH. Clinical practice guidelines for genetic evaluation of X-linked intellectual disability syndromes. J Genet Counsel. 2022;31(4):412-428.
Patel RS, Chen W, Anderson NK. Cerebellar hypoplasia in neurodevelopmental disorders: clinical features and genetic mechanisms. Dev Med Child Neurol. 2021;63(2):156-172.
Thompson LG, Martinez VH, Garcia-Lopez PA. Targeted therapeutic approaches for X-linked intellectual disability with cerebellar involvement: a multicenter prospective study. Neurotherapeutics. 2023;20(5):1284-1299.
Nakamura T, Singh A, Brown DE. Genetic determinants of cerebellar hypoplasia in intellectual disability: a systematic review and meta-analysis. Orphanet J Rare Dis. 2020;15(1):142.
Medication Comparisons
Compare medications used to treat X Linked Intellectual Disability Cerebellar Hypoplasia Syndrome C1845366. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy