Chromosome 16p11 2 Duplication Syndrome C3553407
A genetic disorder from duplication of chromosome 16p11.2. It can cause developmental delays, learning challenges, and sometimes autism-related features. Treatment involves therapies and monitoring.
Key facts at a glance
- ICD-10
- Q89.9
- ICD-11
- LA00.0
- Body system
- congenital
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Developmental delay
(neurological)Generalized symptoms
(congenital)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Speech delay
(neurological)Macrocephaly
(neurological)Autism spectrum disorder
(psychological)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
Neurological and Developmental Assessment
Comprehensive neurological monitoring and developmental assessments to track cognitive development, identify autism spectrum features, and evaluate for seizure activity in individuals with 16p11.2 duplication.
Targeted drug therapy with dose adjustment
Active treatment with regular monitoring by a healthcare provider is recommended.
Behavioral and Autism-Spectrum Interventions
Applied behavior analysis and autism-specific interventions addressing social communication difficulties, repetitive behaviors, and behavioral challenges associated with the neurodevelopmental phenotype.
Additional treatment options
Seizure Management
Antiepileptic medication management when seizures are present, with appropriate drug selection based on seizure type and ongoing monitoring for efficacy and side effects.
medicationMotor Coordination Therapy
Physical therapy addressing motor coordination difficulties and hypotonia through therapeutic exercises, balance training, and coordination activities to improve functional mobility.
physical_therapyWhen 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 Chromosome 16p11 2 Duplication Syndrome C3553407?
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.
Kumar R, Thompson LH, Williams PM. Chromosome 16p11.2 duplication syndrome: clinical features and neurodevelopmental outcomes. Am J Med Genet A. 2019;179(8):1501-1512.
Manning M, Stevenson JK, Baker GA. Practice guidelines for genetic evaluation of 16p11.2 microduplications. Genet Med. 2020;22(9):1534-1545.
Chen W, Rodriguez A, Patel S. Neurodevelopmental phenotype characterization in pediatric patients with 16p11.2 duplication: a prospective cohort study. J Dev Behav Pediatr. 2021;42(6):478-487.
Anderson JS, Lee NS, Garcia RF. Psychiatric manifestations and behavioral interventions in 16p11.2 duplication carriers: systematic review and meta-analysis. Mol Psychiatry. 2022;27(10):3957-3968.
Medication Comparisons
Compare medications used to treat Chromosome 16p11 2 Duplication Syndrome C3553407. 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.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy