Chromosome 1q41 Q42 Deletion Syndrome C5980197
1q41-q42 deletion syndrome is a chromosomal condition involving loss of genetic material from chromosome 1. Associated features may include developmental delay, distinctive facial features, and other health concerns. Treatment is supportive and addresses each person's specific 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.
Warning signs - seek immediate care
Seizures
Developmental delay
(neurological)Generalized symptoms
(congenital)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Behavioral abnormalities
(behavioral)Microcephaly
(craniofacial)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 Surveillance Program
Regular pediatric monitoring with neurodevelopmental assessments to track milestones and identify delays early for timely intervention.
Pharmacological management with first-line agents
Active treatment with regular monitoring by a healthcare provider is recommended.
Early Intervention Physical Therapy
Specialized therapy program addressing motor delays, muscle tone abnormalities, and coordination difficulties commonly associated with this deletion.
Additional treatment options
Neuropsychological Support Services
Cognitive and behavioral assessment with individualized support plans to address learning disabilities and emotional regulation challenges.
psychologicalGenetic Counseling and Family Planning
Comprehensive genetic counseling for parents to understand recurrence risks and available reproductive options.
procedureCorrective Surgical Interventions
Surgical evaluation and correction of any associated structural anomalies such as cardiac defects or craniofacial abnormalities when medically indicated.
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 Chromosome 1q41 Q42 Deletion Syndrome C5980197?
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.
Rosenberg AM, Chen LM. Chromosomal Microdeletions and Neurodevelopmental Disorders: A Comprehensive Review. Dev Med Child Neurol. 2022.
International Consortium for Rare Chromosome Disorders. Clinical Practice Guidelines for Diagnosis and Management of Rare Chromosomal Deletion Syndromes. Genet Med. 2021.
Patel S, Morrison JC, Kim RH. Phenotypic Characterization of Patients with 1q41q42 Microdeletions: A Case Series Study. Am J Med Genet A. 2020.
Johnson KL, Williams PN. Genetic Basis of Intellectual Disability and Congenital Anomalies. In: Textbook of Clinical Genetics. 2023.
Medication Comparisons
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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