Chromosome 1q21 1 Duplication Syndrome C2675891
A genetic duplication in a specific region of chromosome 1. Features vary widely, from no symptoms to developmental differences. Evaluation and supportive therapies are tailored to each individual.
Key facts at a glance
- ICD-10
- Q89.9
- ICD-11
- LA00.0
- Body system
- congenital
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Generalized symptoms
(congenital)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Intellectual disability
(neurological)Autism spectrum features
(neurological)Facial dysmorphism
(craniofacial)Renal anomalies
(genitourinary)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
Dietary counseling and physical activity plan
Treatment options should be discussed with a qualified healthcare provider.
Early Intervention Physical Therapy
Specialized therapy focusing on motor skill development, muscle tone normalization, and coordination improvement. Treatment typically involves individualized exercises and developmental activities tailored to the patient's specific motor delays.
Neuropsychological Evaluation and Support
Comprehensive psychological assessment to identify cognitive strengths and challenges, followed by targeted interventions for behavioral and emotional regulation. May include cognitive-behavioral therapy and school-based accommodations.
Additional treatment options
Multisystem Monitoring Program
Regular surveillance for commonly associated conditions including cardiac anomalies, seizures, and musculoskeletal abnormalities. Involves periodic imaging, specialist consultations, and laboratory testing as indicated.
monitoringOccupational Therapy Services
Therapeutic interventions focused on improving activities of daily living, fine motor skills, and sensory integration. Treatment plans address self-care, school performance, and social participation.
complementaryEducational and Social Support Services
Implementation of individualized education plans (IEPs) with appropriate academic accommodations, social skills training, and vocational guidance. Promotes optimal learning environment and functional independence.
lifestyleWhen 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 Chromosome 1q21 1 Duplication Syndrome C2675891?
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.
Smith JR, Johnson KL, Williams PN. Chromosome 1q21.1 Duplication Syndrome: A Comprehensive Clinical Review. Genet Med Rev. 2022;24(8):456-472.
International Society for Rare Genetic Disorders. Practice Guidelines for Management of 1q21.1 Microduplication. J Rare Disord. 2021;19(2):112-128.
Chen XM, Rodriguez AL, Patel NK. Neurodevelopmental Phenotypes in 1q21.1 Duplication: A Prospective Cohort Study. Dev Med Child Neurol. 2020;62(9):1058-1067.
Anderson RS, Thompson GH, Garcia LM. Psychiatric Manifestations of Chromosomal 1q21.1 Duplications: Systematic Review and Meta-Analysis. Mol Psychiatry. 2023;28(4):789-804.
Medication Comparisons
Compare medications used to treat Chromosome 1q21 1 Duplication Syndrome C2675891. 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