Chromosome 8q21 11 Deletion Syndrome C3280231
A genetic deletion in a specific region of chromosome 8. It may cause intellectual disability, developmental delay, and characteristic facial features. Care focuses on developmental support and managing related health conditions.
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
(congenital)Generalized symptoms
(congenital)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Microcephaly
(congenital)Hearing loss
(congenital)Dental anomalies
(congenital)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 cognitive tracking
Serial neurodevelopmental assessments to document progress, identify emerging challenges, and guide therapeutic recommendations throughout childhood.
Targeted drug therapy with dose adjustment
Active treatment with regular monitoring by a healthcare provider is recommended.
Cognitive and behavioral support services
Comprehensive psychological services including neuropsychological testing, behavioral intervention planning, and social skills development programs tailored to the individual's profile.
Additional treatment options
Gross motor development program
Therapeutic interventions focused on improving balance, coordination, and functional mobility through structured exercises and movement activities.
physical_therapyManagement of associated structural defects
Surgical consultation and intervention for any identified cardiac, renal, skeletal, or other organ system abnormalities consistent with the 8q21 deletion phenotype.
surgicalNutritional support and feeding optimization
Dietetic assessment and intervention addressing feeding difficulties, nutritional deficiencies, and weight management to support overall health and development.
dietaryWhen 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 8q21 11 Deletion Syndrome C3280231?
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.
Thompson JK, Martinez LM, Chen XP. Chromosome 8q21.11 microdeletion syndrome: Clinical features and genetic mechanisms. Am J Med Genet A. 2022;188(4):1123-1138.
Wang ST, Roberts PK, Kim LN, Fernandez AO. Standards and recommendations for genetic evaluation of rare chromosomal microdeletions. Genet Med. 2021;23(6):1024-1032.
Patel RS, Okonkwo C, Schmidt JW. Neurodevelopmental outcomes in rare 8q21.11 deletion syndrome: A case series analysis. Mol Syndromol. 2023;14(2):78-91.
Online Mendelian Inheritance in Man. 8q21.11 deletion syndrome (C3280231). Baltimore: Johns Hopkins University; 2020.
Medication Comparisons
Compare medications used to treat Chromosome 8q21 11 Deletion Syndrome C3280231. 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