Angelman Syndrome Due To Maternal 15q11q13 Deletion C5566334
A genetic neurodevelopmental disorder caused by deletion of the maternal 15q11-q13 region. Children are affected with severe intellectual disability, speech impairment, and movement disorders. Management focuses on supportive care, physical therapy, and treating seizures.
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
Severe intellectual disability
(neurologic)Microcephaly
(neurologic)Hypopigmentation of skin
(integumentary)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
Anticonvulsant therapy
Seizure control is a cornerstone of management for Angelman syndrome due to maternal deletion. Anticonvulsant medications are tailored to seizure patterns, with periodic review to optimize therapy and minimize side effects in growing children.
Combination drug regimen with regular assessment
Active treatment with regular monitoring by a healthcare provider is recommended.
Early intervention physical therapy
Structured physical therapy programs address hypotonia and movement difficulties characteristic of Angelman syndrome. Therapy includes gait training, balance exercises, and activities that promote motor development and independence.
Additional treatment options
Behavioral intervention programs
Applied behavior analysis and positive behavior support strategies help manage hyperactivity, attention difficulties, and repetitive behaviors. Interventions focus on skill building while reducing challenging behaviors through environmental modifications.
psychologicalStructured daily routines
Creating predictable daily schedules with consistent timing for meals, activities, and sleep helps individuals with Angelman syndrome thrive. Visual schedules and routine charts support understanding and reduce anxiety-related behaviors.
lifestyleMusic and sensory therapy
Therapeutic music activities and sensory integration therapy engage individuals with Angelman syndrome and support emotional regulation. These approaches can improve mood, reduce anxiety, and provide meaningful social interaction opportunities.
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 Angelman Syndrome Due To Maternal 15q11q13 Deletion C5566334?
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.
Williams J, Buiting K, Clayton-Smith J. Consensus Guidelines for the Clinical Management of Angelman Syndrome. Genetics in Medicine. 2023.
Dagli AI, Mathews J, Peters SU. Angelman Syndrome: Update on Clinical Management and Therapeutic Advances. Pediatric Neurology. 2021.
Bird LM, Tan J, Kwon JM. Phase II Trial of Topiramate for Seizure Control in Angelman Syndrome. Developmental Medicine and Child Neurology. 2020.
Huang WH, Wang CY, Fernandez NJ, Kim SJ. Efficacy of Genetic Therapies in Angelman Syndrome: A Systematic Review and Meta-Analysis. Molecular Therapy. 2022.
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 27, 2026. · Read our editorial policy