Monosomy 8q12 21 Cn036605
A rare chromosomal abnormality where part of chromosome 8 is missing. It can affect development and cause various health differences. Care involves supportive approaches based on individual needs.
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.
Generalized symptoms
(congenital)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Growth retardation
(endocrine)Intellectual disability
(neurological)Microcephaly
(neurological)Skeletal abnormalities
(musculoskeletal)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 Surveillance
Regular multidisciplinary monitoring including growth assessment, neurodevelopmental evaluation, cardiac imaging, and hearing/vision screening to identify and address complications early.
Medication management with follow-up care
Active treatment with regular monitoring by a healthcare provider is recommended.
Early Intervention Physical Therapy
Structured physical therapy program addressing motor delays, muscle tone abnormalities, and promoting age-appropriate gross motor skill development.
Additional treatment options
Neuropsychological Support Services
Cognitive assessment and targeted interventions for learning disabilities, behavioral challenges, and social-emotional development.
psychologicalSpecialist Surgical Referrals
Evaluation by relevant surgical specialists for structural anomalies commonly associated with chromosomal deletions, including cardiac, craniofacial, or orthopedic surgeons as indicated.
procedureGenetic Counseling Services
Family genetic counseling to discuss inheritance patterns, recurrence risks, prenatal testing options, and available family support 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 Monosomy 8q12 21 Cn036605?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
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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