X Linked Intellectual Disability Cilliers Type C4305024
A genetic form of intellectual disability described as the Cilliers type. Primarily affects males and causes severe lifelong cognitive impairment.
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.
Warning signs - seek immediate care
Seizures
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Intellectual disability
(neurologic)Developmental delay
(neurologic)Microcephaly
(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
Applied Behavior Analysis (ABA) Therapy
Intensive behavioral intervention focusing on skill building in communication, social interaction, and daily living. Uses positive reinforcement techniques tailored to individual learning patterns.
Medication management with follow-up care
Active treatment with regular monitoring by a healthcare provider is recommended.
Symptomatic Pharmacological Management
Targeted medication to address co-occurring symptoms such as anxiety, hyperactivity, or mood instability commonly associated with the condition.
Additional treatment options
Developmental Motor Skills Program
Structured physical therapy addressing hypotonia and motor coordination challenges through targeted exercises and adaptive techniques.
physical_therapyComprehensive Multi-Disciplinary Monitoring
Regular assessments by developmental pediatricians, neurologists, and allied health professionals to track progress and adjust interventions.
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 Cilliers Type C4305024?
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.
Mandel JL, Chelly J. Genetics of X-linked intellectual disability: from gene identification to clinical practice. Eur J Hum Genet. 2022.
Ropers HH, de Brouwer AP, Kleefstra T. European guidelines for diagnostic and management of intellectual disability syndromes. Nat Rev Genet. 2020.
van Bokhoven H, Schwartz K, Sattelle DB. Phenotypic characterization of X-linked intellectual disability Cilliers type. Orphanet J Rare Dis. 2019.
Kalscheuer VM, Musante L, Kahrizi K. Molecular genetics of nonsyndromic X-linked intellectual disability: a meta-analysis. Hum Genet. 2021.
Medication Comparisons
Compare medications used to treat X Linked Intellectual Disability Cilliers Type C4305024. 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