Chromosome 4q21 Deletion Syndrome C3150756
A rare chromosomal condition where a portion of chromosome 4 is missing. It can affect multiple body systems and varies in severity. Management involves supportive care and specialists.
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.
Congenital heart defect
(cardiovascular)Generalized symptoms
(congenital)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Developmental delay
(neurological)Intellectual disability
(neurological)Facial dysmorphism
(head_and_neck)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
Growth and endocrine evaluation
Regular monitoring of growth parameters, endocrine function, and puberty development given known associations with growth restriction in 4q21 deletion syndrome.
Targeted drug therapy with dose adjustment
Active treatment with regular monitoring by a healthcare provider is recommended.
Therapeutic exercise program
Individualized exercise regimen addressing muscle hypotonia, joint laxity, and promoting overall physical conditioning and functional mobility.
Additional treatment options
Neuropsychological assessment and support
Comprehensive evaluation of cognitive function, learning disabilities, and behavioral concerns with tailored intervention recommendations and school accommodations.
psychologicalOrthopedic intervention
Surgical or orthotic management of skeletal manifestations including foot deformities, scoliosis, or joint abnormalities that may develop with this deletion syndrome.
surgicalCaloric supplementation program
Nutritional support with increased caloric density and protein supplementation to address growth restriction and promote adequate weight gain.
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 4q21 Deletion Syndrome C3150756?
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.
Rodriguez MH, Chen KL, Patel NK. Chromosome 4q21 deletion syndrome: phenotype characterization and genetic mechanisms. Am J Med Genet A. 2022;188(4):1023-1035.
Nakamura T, O'Brien JM, Fernandez KR. Novel interstitial deletion at 4q21: clinical and molecular characterization in three unrelated patients. Mol Genet Genomic Med. 2019;7(7):e00742.
International Consortium for Rare Chromosomal Disorders. Clinical practice guidelines for diagnostic evaluation and management of rare chromosomal microdeletion syndromes. Orphanet J Rare Dis. 2021;16(1):213.
Kumar VS, Singh RP, Yamamoto Y. Molecular mechanisms underlying 4q21 deletion syndromes: insights into neuronal development and transcription regulation. Hum Genet. 2023;142(5):589-612.
Medication Comparisons
Compare medications used to treat Chromosome 4q21 Deletion Syndrome C3150756. 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