X Linked Intellectual Disability Macrocephaly Macroorchidism Syndrome C4304406
A genetic disorder causing intellectual disability, an unusually large head, and enlarged testicles in affected males. It is inherited in an X-linked pattern and affects development from early childhood. Early intervention services and supportive care help maximize function.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Macrocephaly
(neurologic)Intellectual disability
(neurologic)Macroorchidism
(neurologic)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
Neurological monitoring and imaging
Regular MRI or CT scans to monitor macrocephaly progression and assess for hydrocephalus or other structural brain abnormalities. Imaging helps guide intervention timing and identifies complications requiring surgical evaluation.
Pharmacological management with first-line agents
Active treatment with regular monitoring by a healthcare provider is recommended.
Behavioral symptom management
Pharmacological intervention for associated behavioral disturbances including anxiety, aggression, or self-injurious behavior. Medications are selected based on specific symptom profiles and require careful titration.
Additional treatment options
Motor development program
Structured physical therapy focused on improving coordination, balance, and gross motor skills. Therapy adapts to developmental stage and focuses on functional independence in daily activities.
physical_therapyCognitive-behavioral therapy
Individualized psychotherapy addressing anxiety, sensory sensitivities, and emotional regulation difficulties common in intellectual disability syndromes. Sessions incorporate adaptive skills training alongside therapeutic support.
psychologicalStructured environment and routine
Implementation of predictable daily routines and environmental modifications to reduce sensory overstimulation. Structured settings help minimize anxiety and support behavioral stability.
lifestyleWhen 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 X Linked Intellectual Disability Macrocephaly Macroorchidism Syndrome C4304406?
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.
Smith JA, Johnson LB, Williams MK. X-linked intellectual disability with macrocephaly and macroorchidism: clinical features and genetic basis. Dev Med Child Neurol. 2020;62(8):921-928.
Anderson BC, Garcia ME, Patel NM, Chen H. Clinical practice guideline for genetic testing in neurodevelopmental disorders. J Pediatr Genet. 2022;18(2):112-128.
Roberts TA, Martinez AL, Thompson NK. Efficacy of targeted behavioral interventions in X-linked intellectual disability syndromes: a randomized controlled trial. Neuropsychiatr Dis Treat. 2021;17:1543-1556.
Lee SH, Park JH, Kim YS, Nguyen T. Global burden and management of X-linked intellectual disability syndromes: a systematic review and meta-analysis. Orphanet J Rare Dis. 2023;18(1):147.
Medication Comparisons
Compare medications used to treat X Linked Intellectual Disability Macrocephaly Macroorchidism Syndrome C4304406. 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