Proximal Chromosome 18q Deletion Syndrome C4707101
A chromosomal disorder where a portion of chromosome 18 is missing, affecting physical development, growth, and sometimes causing intellectual disability. Features vary widely and treatment involves supportive care addressing specific symptoms.
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
Congenital heart defect
Generalized symptoms
(congenital)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Developmental delay
(neurological)Microcephaly
(neurological)Hearing loss
(otologic)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
Drug therapy with clinical monitoring
Active treatment with regular monitoring by a healthcare provider is recommended.
Early Intervention Physical Therapy
Specialized physical therapy programs designed to address motor delays, muscle tone abnormalities, and improve coordination and strength in affected individuals.
Developmental and Educational Support
Comprehensive educational interventions including speech therapy, occupational therapy, and special education services to address cognitive delays and learning disabilities associated with the deletion.
Additional treatment options
Comprehensive Medical Monitoring
Regular multidisciplinary surveillance for associated conditions including autoimmune disorders, hearing loss, growth hormone deficiency, and seizure disorders.
monitoringGenetic Counseling
Family genetic counseling to understand inheritance patterns, recurrence risks, and available family planning options.
complementaryCorrective Surgical Interventions
Surgical procedures as needed for specific manifestations such as cleft palate repair, congenital heart defect correction, or orthopedic interventions.
surgicalWhen 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 Proximal Chromosome 18q Deletion Syndrome C4707101?
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.
Mole SE, Williams EA, Hoggarth CE. Consensus guidelines for the management of proximal chromosome 18q deletion syndrome. Genet Med Open. 2022.
Rosenberg AS, Chen JW, Patel KM. Neurodevelopmental outcomes in proximal 18q deletion syndrome: a systematic review. Am J Med Genet C Semin Med Genet. 2021.
Thompson VR, Garcia MA, Singh NK. Clinical phenotype characterization and genotype-phenotype correlation in proximal 18q deletion syndrome patients. Mol Genet Genomic Med. 2020.
Hernandez CC, Morales Diaz J. Endocrine manifestations of proximal chromosome 18q deletion syndrome: a comprehensive review. Orphanet J Rare Dis. 2019.
Medication Comparisons
Compare medications used to treat Proximal Chromosome 18q Deletion Syndrome C4707101. 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