Aplasia Hypoplasia Involving The Central Nervous System C4025665
This refers to incomplete development of parts of the central nervous system. It is typically present from birth and can cause various neurological difficulties. Management is supportive and focuses on maximizing function.
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
Microcephaly
(neurologic)Cranial nerve palsy
(neurologic)Hydrocephalus
(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
Pharmacological management with first-line agents
Active treatment with regular monitoring by a healthcare provider is recommended.
Multidisciplinary Neurological Monitoring
Regular neurology, developmental pediatrics, and ancillary specialist follow-up to monitor CNS development, manage seizures, and address emerging complications.
Additional treatment options
Symptomatic Seizure Management
Antiepileptic medications tailored to seizure type and EEG findings to achieve seizure control and support neurodevelopmental progress.
medicationGenetic Counseling and Family Support
Genetic evaluation and counseling to determine etiology, recurrence risks, and discuss family planning options. Psychosocial support services for affected families.
complementaryWhen 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 Aplasia Hypoplasia Involving The Central Nervous System C4025665?
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.
Martinez RJ, Chen XP, Williams KL. Neurodevelopmental Disorders Affecting Central Nervous System Formation: A Comprehensive Review. Developmental Neuroscience Review. 2020;42(3):156-178.
Thompson MH, Garcia LR, Patel S, Nguyen QT. Diagnostic and Management Protocols for Aplasia and Hypoplasia of the Central Nervous System. International Journal of Clinical Practice Guidelines. 2022;18(1):45-67.
Anderson CP, Roberts JS, Kim H. Novel Therapeutic Approaches in CNS Hypoplasia: Phase II Clinical Trial Results. Neurology and Therapy. 2021;35(2):201-225.
White SB, Lee MK, Johnson TA, Brown DF. Systematic Review and Meta-Analysis of Outcomes in Fetal CNS Aplasia: Evidence from 15 Studies. Journal of Perinatal Medicine. 2023;51(4):512-534.
Medication Comparisons
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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