Distal Trisomy 18q C5190516
A rare chromosomal abnormality with extra genetic material on chromosome 18's long arm, causing developmental delays and multiple medical complications. Management addresses individual 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.
Developmental delay
(nervous)Generalized symptoms
(congenital)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Microcephaly
(nervous)Corpus callosum agenesis
(nervous)Renal agenesis
(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
Comprehensive Developmental Pediatric Monitoring
Regular multidisciplinary follow-up with developmental pediatrics to assess growth, neurodevelopment, and screen for associated conditions such as cardiac anomalies, hearing loss, and skeletal abnormalities typical of distal trisomy 18q.
Medication management with follow-up
Active treatment with regular monitoring by a healthcare provider is recommended.
Early Intervention Physical and Occupational Therapy
Structured therapy programs addressing hypotonia, motor delays, and developmental coordination problems commonly seen in distal trisomy 18q, utilizing adaptive techniques and developmental milestone tracking.
Additional treatment options
Seizure Management Therapy
Antiepileptic medication therapy tailored to individual seizure types, with regular EEG monitoring and medication level assessments to optimize seizure control in patients with neurologic involvement.
medicationCardiac Anomaly Surgical Correction
Surgical intervention for congenital heart defects such as VSD, ASD, or tetralogy of Fallot that may accompany distal trisomy 18q, performed by pediatric cardiac surgery teams with experience in chromosomal disorders.
surgicalFamily Counseling and Support Services
Psychological support and genetic counseling for families managing the complex needs of children with distal trisomy 18q, addressing caregiver stress, family dynamics, and future planning.
psychologicalWhen 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 Distal Trisomy 18q C5190516?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
Compare medications used to treat Distal Trisomy 18q C5190516. 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 25, 2026. · Read our editorial policy