16p12 2 Microdeletion Syndrome C4708497
A rare genetic condition where a small piece of chromosome 16 is missing. It can cause developmental delays, intellectual disability, and recurrent infections in some individuals. Treatment involves supportive therapies and medical management of symptoms.
Key facts at a glance
- ICD-10
- Q89.9
- ICD-11
- LA00.0
- Body system
- congenital
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Epileptic episodes that may vary in type and severity, requiring neurological evaluation.
Seek immediate medical attention for any seizure activity, especially first-time seizures.
Congenital heart defect
Structural heart abnormalities present at birth, such as ventricular septal defects or other cardiac malformations.
Cardiac evaluation is essential; seek immediate care if symptoms of heart failure develop such as difficulty breathing or poor feeding.
Developmental delay
(neurologic)Delayed attainment of developmental milestones such as sitting, walking, and crawling compared to typical age expectations.
Frequency: 80-90% of patients
Speech and language delay
(neurologic)Delayed onset of speech and difficulty with language development, often including expressive language challenges.
Frequency: 75-85% of patients
Intellectual disability
(neurologic)Mild to moderate intellectual disability affecting cognitive functioning and learning abilities.
Frequency: 50-70% of patients
Behavioral problems
(neurologic)Features resembling autism spectrum disorder or attention-deficit/hyperactivity disorder, including social difficulties and hyperactivity.
Frequency: 40-60% of patients
Facial dysmorphism
(constitutional)Characteristic facial features including deep-set eyes, broad nasal bridge, and ear abnormalities.
Frequency: 50-70% of patients
Motor delay
(neurologic)Delayed motor skills including fine and gross motor coordination difficulties.
Frequency: 60-75% of patients
Growth retardation
(constitutional)Poor growth velocity resulting in short stature and low weight for age.
Frequency: 40-60% of patients
Renal abnormalities
(genitourinary)Kidney structural anomalies such as renal hypoplasia or horseshoe kidney.
Frequency: 10-20% of patients
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
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Motor Skills Development Program
Targeted physical therapy focusing on gross and fine motor skill development, balance, and coordination challenges commonly seen in 16p12.2 microdeletion syndrome. Therapy incorporates play-based activities to improve motor planning and strength.
Speech and Language Therapy
Specialized speech therapy addressing communication delays, articulation difficulties, and pragmatic language challenges. Therapy may include augmentative and alternative communication (AAC) strategies when appropriate.
Additional treatment options
Cardiac and Renal Assessment
Baseline echocardiogram and renal ultrasound with periodic follow-up surveillance for structural anomalies that may be associated with 16p12.2 microdeletion. Early identification allows for timely intervention if abnormalities are detected.
monitoringEducational Support Services
Individualized education plans (IEPs) with appropriate accommodations including extended time, simplified instructions, and specialized instruction in core academic areas matched to the individual's learning profile.
lifestyleGenetic Counseling Services
Comprehensive genetic counseling including discussion of the diagnosis, inheritance patterns, family planning options, and recurrence risk assessment. May include referral to reproductive specialists if requested.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is 16p12 2 Microdeletion Syndrome C4708497?
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.
Coe BP, Witherspoon K, Rosenfeld JA, et al. Refining analyses of copy number variation identifies specific genes associated with developmental delay. Nat Genet. 2014;46(10):1063-1071.
St. Heui G, Hannes ED, Hammond P, et al. Refining the phenotype of 16p12.2 microdeletion. Am J Med Genet A. 2012;158A(9):2192-2198.
Cooper GM, Coe BP, Girirajan S, et al. A copy number variation morbidity map of developmental delay. Nat Genet. 2011;43(9):838-846.
Mikhail FM, Burnside RD, Rush B, et al. The integrated genomic architecture and evolution of dental derivation in toothless mammals. Nat Genet. 2011;43(7):648-655.
Rosenfeld JA, Coe BP, Eichler EE, et al. Estimates of penetrance for recurrent pathogenic copy-number variations. Nat Rev Genet. 2013;14(11):794.
Rauch A, Hoyer J, Guth S, et al. Diagnostic yield of various genetic approaches in patients with unexplained developmental delay/intellectual disability. Am J Med Genet A. 2006;140(19):2063-2074.
Watson CT, Sharp AJ. The emerging role of segmental duplications in neurodevelopmental disorders. Curr Opin Genet Dev. 2012;22(3):230-237.
GeneReviews. 16p12.2 microdeletion syndrome. In: Adam MP, Ardinger HH, Pagon RA, et al., editors. GeneReviews [Internet]. Seattle (WA): University of Washington; 1993-2024.
Medication Comparisons
Compare medications used to treat 16p12 2 Microdeletion Syndrome C4708497. 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