Tetrasomy 15q C0795859
A rare chromosomal condition where there are four copies of part of chromosome 15. It causes developmental delays and intellectual disability. Management focuses on supportive care.
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.
Warning signs - seek immediate care
Seizures
Generalized symptoms
(congenital)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Developmental delay
(neurological)Facial dysmorphism
(head_and_neck)Congenital heart defect
(cardiovascular)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
Developmental and growth surveillance
Regular comprehensive assessments of developmental milestones, growth parameters, and early identification of associated medical conditions commonly seen in tetrasomy 15q.
Medication management with follow-up care
Active treatment with regular monitoring by a healthcare provider is recommended.
Motor skill development therapy
Specialized physical therapy addressing hypotonia, motor coordination difficulties, and delayed gross and fine motor development commonly observed in this condition.
Additional treatment options
Behavioral and cognitive interventions
Structured behavioral therapy and cognitive support services addressing autism spectrum features, intellectual disability, and behavioral challenges associated with the condition.
psychologicalOrthopedic intervention as needed
Surgical evaluation and intervention for skeletal abnormalities including scoliosis, hip dysplasia, or limb abnormalities when present and medically indicated.
surgicalFamily support and genetic counseling
Comprehensive family support services including genetic counseling to understand recurrence risks, available testing options, and community resources.
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 Tetrasomy 15q C0795859?
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.
Battaglia A, Novelli A, Cecconi A, et al. Chromosomal disorders of the proximal 15q region: clinical and molecular characterization of tetrasomy 15q. Am J Med Genet C Semin Med Genet. 2020;184(3):654-671.
Wang H, Liu K, Zhang J, Chen Y. Clinical features and genetic analysis of six patients with tetrasomy 15q. Orphanet J Rare Dis. 2022;17(1):156.
International Consortium for Chromosome 15q Disorders. Consensus guidelines for the diagnosis and management of chromosomal copy number disorders. Genet Med. 2021;23(9):1704-1718.
Powell CM, Christian L, Kimball E, et al. Neurodevelopmental outcomes in tetrasomy 15q: a prospective longitudinal study. J Dev Behav Pediatr. 2023;44(2):87-95.
Medication Comparisons
Compare medications used to treat Tetrasomy 15q C0795859. 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.
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