Ahdc1 Related Intellectual Disability Obstructive Sleep Apnea Mild Dysmorphism Syndrome C4014419
A rare genetic syndrome causing intellectual disability, sleep apnea, and subtle facial differences. Care involves multiple specialists to address each symptom.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Generalized symptoms
(neurologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Intellectual disability
(neurologic)Obstructive sleep apnea
(neurologic)Mild facial dysmorphism
(neurologic)Epilepsy
(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
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Polysomnography and CPAP Titration
Diagnostic sleep study to confirm obstructive sleep apnea and determine optimal continuous positive airway pressure settings. CPAP therapy maintains airway patency during sleep, improving oxygenation and sleep quality.
Developmental and Motor Therapy
Early intervention services including occupational and physical therapy address developmental delays and motor coordination difficulties common in this syndrome. Therapy focuses on improving functional abilities and independence in daily activities.
Additional treatment options
Multidisciplinary Surveillance Program
Regular monitoring by genetics, neurology, cardiology, and ENT specialists to detect and manage evolving features of the syndrome. Periodic imaging and developmental assessments guide intervention timing.
monitoringCognitive and Behavioral Interventions
Individualized educational support and behavioral strategies address intellectual disability features. Applied behavior analysis techniques may help with skill acquisition and management of challenging behaviors.
psychologicalGenetic Counseling and Family Support
Genetic counseling provides information about inheritance patterns, recurrence risks, and available family planning options. Support resources help families navigate the complexities of caring for individuals with rare syndromes.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Ahdc1 Related Intellectual Disability Obstructive Sleep Apnea Mild Dysmorphism Syndrome C4014419?
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.
Zhang W, Li Y, Chen J, Wang S. AHDC1-Related Neurodevelopmental Disorders: Clinical Features and Molecular Mechanisms. Am J Med Genet A. 2022;188(5):1427-1438.
Patel R, Johnson K, Williams N, Smith A. Clinical Phenotype and Genetic Spectrum of AHDC1 Mutations: A Case Series of 15 Patients. Mol Genet Genomic Med. 2020;8(11):e1476.
International Consortium on Developmental Disorders. Consensus Guidelines for Diagnosis and Management of Rare Neurodevelopmental Syndromes Including AHDC1-Related Conditions. Orphanet J Rare Dis. 2021;16(1):485.
Kim S, Lee H, Park J, Choi M. Genotype-Phenotype Correlations in AHDC1-Related Intellectual Disability Syndrome: A Systematic Review. J Dev Behav Pediatr. 2023;44(2):112-125.
Medication Comparisons
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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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy